diff --git a/inventory_management_system_api/core/exceptions.py b/inventory_management_system_api/core/exceptions.py
index 52fc91ca..964beb7a 100644
--- a/inventory_management_system_api/core/exceptions.py
+++ b/inventory_management_system_api/core/exceptions.py
@@ -57,6 +57,10 @@ class ChildrenElementsExistError(DatabaseError):
     """
 
 
+class PartOfCatalogueItemError(DatabaseError):
+    """
+    Exception raised when attempting to delete a manufacturer that is a part of a catalogue item
+    """
 class DatabaseIntegrityError(DatabaseError):
     """
     Exception raised when something is found in the database that shouldn't have been
diff --git a/inventory_management_system_api/models/catalogue_item.py b/inventory_management_system_api/models/catalogue_item.py
index 63adda10..7b88dd39 100644
--- a/inventory_management_system_api/models/catalogue_item.py
+++ b/inventory_management_system_api/models/catalogue_item.py
@@ -3,21 +3,11 @@
 """
 from typing import Optional, List, Any
 
-from pydantic import BaseModel, Field, validator
+from pydantic import BaseModel, Field, HttpUrl, validator
 
 from inventory_management_system_api.models.custom_object_id_data_types import CustomObjectIdField, StringObjectIdField
 
 
-class Manufacturer(BaseModel):
-    """
-    Model representing a catalogue item manufacturer.
-    """
-
-    name: str
-    address: str
-    web_url: str
-
-
 class Property(BaseModel):
     """
     Model representing a catalogue item property.
@@ -28,6 +18,14 @@ class Property(BaseModel):
     unit: Optional[str] = None
 
 
+class Manufacturer(BaseModel):
+    """Input database model for a manufacturer"""
+
+    name: str
+    url: HttpUrl
+    address: str
+
+
 class CatalogueItemIn(BaseModel):
     """
     Input database model for a catalogue item.
@@ -37,6 +35,8 @@ class CatalogueItemIn(BaseModel):
     name: str
     description: str
     properties: List[Property] = []
+    # pylint: disable=fixme
+    # TODO - Change from manufacturer to manufacturer id
     manufacturer: Manufacturer
 
     @validator("properties", pre=True, always=True)
diff --git a/inventory_management_system_api/repositories/manufacturer.py b/inventory_management_system_api/repositories/manufacturer.py
index d3fb77c2..af3a0302 100644
--- a/inventory_management_system_api/repositories/manufacturer.py
+++ b/inventory_management_system_api/repositories/manufacturer.py
@@ -10,7 +10,11 @@
 
 from inventory_management_system_api.core.custom_object_id import CustomObjectId
 from inventory_management_system_api.core.database import get_database
-from inventory_management_system_api.core.exceptions import DuplicateRecordError, MissingRecordError
+from inventory_management_system_api.core.exceptions import (
+    DuplicateRecordError,
+    MissingRecordError,
+    PartOfCatalogueItemError,
+)
 
 from inventory_management_system_api.models.manufacturer import ManufacturerIn, ManufacturerOut
 
@@ -28,6 +32,7 @@ def __init__(self, database: Database = Depends(get_database)) -> None:
 
         self._database = database
         self._collection: Collection = self._database.manufacturer
+        self._catalogue_item_collection: Collection = self._database.catalogue_items
 
     def create(self, manufacturer: ManufacturerIn) -> ManufacturerOut:
         """
@@ -104,6 +109,23 @@ def update(self, manufacturer_id: str, manufacturer: ManufacturerIn) -> Manufact
         manufacturer = self.get(str(manufacturer_id))
         return manufacturer
 
+    def delete(self, manufacturer_id: str) -> None:
+        """
+        Delete a manufacturer by its ID from MongoDB database.
+        Checks if manufactuer is a part of an item, and does not delete if it is
+
+        :param manufacturer_id: The ID of the manufacturer to delete
+        :raises ExistIn
+        """
+        manufacturer_id = CustomObjectId(manufacturer_id)
+        if self.is_manufacturer_in_catalogue_item(str(manufacturer_id)):
+            raise PartOfCatalogueItemError("The specified manufacturer is a part of a Catalogue Item")
+
+        logger.info("Deleting manufacturer with ID %s from the database", manufacturer_id)
+        result = self._collection.delete_one({"_id": manufacturer_id})
+        if result.deleted_count == 0:
+            raise MissingRecordError(f"No manufacturer found with ID: {str(manufacturer_id)}")
+
     def _is_duplicate_manufacturer(self, code: str) -> bool:
         """
         Check if manufacturer with the same url already exists in the manufacturer collection
@@ -114,3 +136,13 @@ def _is_duplicate_manufacturer(self, code: str) -> bool:
         logger.info("Checking if manufacturer with code '%s' already exists", code)
         count = self._collection.count_documents({"code": code})
         return count > 0
+
+    def is_manufacturer_in_catalogue_item(self, manufacturer_id: str) -> bool:
+        """Checks to see if any of the documents in the database have a specific manufactuer id
+
+        :param manufacturer_id: The ID of the manufacturer that is looked for
+        :return Returns True if 1 or more documents have the manufacturer ID, false if none do
+        """
+        manufacturer_id = CustomObjectId(manufacturer_id)
+        count = self._catalogue_item_collection.count_documents({"manufacturer_id": manufacturer_id})
+        return count > 0
diff --git a/inventory_management_system_api/routers/v1/manufacturer.py b/inventory_management_system_api/routers/v1/manufacturer.py
index 2386ab44..4bd017a2 100644
--- a/inventory_management_system_api/routers/v1/manufacturer.py
+++ b/inventory_management_system_api/routers/v1/manufacturer.py
@@ -9,6 +9,7 @@
     DuplicateRecordError,
     InvalidObjectIdError,
     MissingRecordError,
+    PartOfCatalogueItemError,
 )
 
 from inventory_management_system_api.schemas.manufacturer import (
@@ -110,3 +111,26 @@ def edit_manufacturer(
         message = "A manufacturer with the same name has been found"
         logger.exception(message)
         raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=message) from exc
+
+
+@router.delete(
+    path="/{manufacturer_id}",
+    summary="Delete a manufacturer by its ID",
+    response_description="Manufacturer deleted successfully",
+    status_code=status.HTTP_204_NO_CONTENT,
+)
+def delete_manufacturer(manufacturer_id: str, manufacturer_service: ManufacturerService = Depends()) -> None:
+    # pylint: disable=missing-function-docstring
+    logger.info("Deleting manufacturer with ID: %s", manufacturer_id)
+    try:
+        manufacturer_service.delete(manufacturer_id)
+    except (MissingRecordError, InvalidObjectIdError) as exc:
+        logger.exception("The specified manufacturer does not exist")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="The specified manufacturer does not exist"
+        ) from exc
+    except PartOfCatalogueItemError as exc:
+        logger.exception("The specified manufacturer is a part of a Catalogue Item")
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT, detail="The specified manufacturer is a part of a Catalogue Item"
+        ) from exc
diff --git a/inventory_management_system_api/schemas/catalogue_item.py b/inventory_management_system_api/schemas/catalogue_item.py
index 4e6d2b48..ec3ee849 100644
--- a/inventory_management_system_api/schemas/catalogue_item.py
+++ b/inventory_management_system_api/schemas/catalogue_item.py
@@ -6,14 +6,12 @@
 from pydantic import BaseModel, Field, HttpUrl
 
 
-class ManufacturerSchema(BaseModel):
-    """
-    Schema model for a catalogue item manufacturer creation request.
-    """
+class ManufacturerPostRequestSchema(BaseModel):
+    """Schema model for a manufacturer creation request"""
 
-    name: str = Field(description="The name of the manufacturer")
-    address: str = Field(description="The address of the manufacturer")
-    web_url: HttpUrl = Field(description="The website URL of the manufacturer")
+    name: str
+    url: HttpUrl
+    address: str
 
 
 class PropertyPostRequestSchema(BaseModel):
@@ -44,7 +42,9 @@ class CatalogueItemPostRequestSchema(BaseModel):
     name: str = Field(description="The name of the catalogue item")
     description: str = Field(description="The catalogue item description")
     properties: Optional[List[PropertyPostRequestSchema]] = Field(description="The catalogue item properties")
-    manufacturer: ManufacturerSchema = Field(description="The details of the manufacturer")
+    # pylint: disable=fixme
+    # TODO - Change from manufacturer to manufacturer id
+    manufacturer: ManufacturerPostRequestSchema = Field(description="The details of the manufacturer")
 
 
 class CatalogueItemPatchRequestSchema(CatalogueItemPostRequestSchema):
@@ -57,7 +57,9 @@ class CatalogueItemPatchRequestSchema(CatalogueItemPostRequestSchema):
     )
     name: Optional[str] = Field(description="The name of the catalogue item")
     description: Optional[str] = Field(description="The catalogue item description")
-    manufacturer: Optional[ManufacturerSchema] = Field(description="The details of the manufacturer")
+    # pylint: disable=fixme
+    # TODO - Change from manufacturer to manufacturer id
+    manufacturer: Optional[ManufacturerPostRequestSchema] = Field(description="The details of the manufacturer")
 
 
 class CatalogueItemSchema(CatalogueItemPostRequestSchema):
diff --git a/inventory_management_system_api/services/manufacturer.py b/inventory_management_system_api/services/manufacturer.py
index e8c21e2e..f36daf26 100644
--- a/inventory_management_system_api/services/manufacturer.py
+++ b/inventory_management_system_api/services/manufacturer.py
@@ -8,7 +8,6 @@
 from fastapi import Depends
 from inventory_management_system_api.core.exceptions import MissingRecordError
 from inventory_management_system_api.models.manufacturer import ManufacturerIn, ManufacturerOut
-
 from inventory_management_system_api.repositories.manufacturer import ManufacturerRepo
 from inventory_management_system_api.schemas.manufacturer import (
     ManufacturerPatchRequstSchema,
@@ -21,7 +20,10 @@
 class ManufacturerService:
     """Service for managing manufacturers"""
 
-    def __init__(self, manufacturer_repository: ManufacturerRepo = Depends(ManufacturerRepo)) -> None:
+    def __init__(
+        self,
+        manufacturer_repository: ManufacturerRepo = Depends(ManufacturerRepo),
+    ) -> None:
         """
         Initialise the manufacturer service with a ManufacturerRepo
 
@@ -91,3 +93,12 @@ def update(self, manufacturer_id: str, manufacturer: ManufacturerPatchRequstSche
 
         logger.info(stored_manufacturer.address)
         return self._manufacturer_repository.update(manufacturer_id, ManufacturerIn(**stored_manufacturer.dict()))
+
+    def delete(self, manufacturer_id: str) -> None:
+        """
+        Delete a manufacturer by its ID
+
+        :param manufacturer_id: The ID of the manufacturer to delete
+
+        """
+        return self._manufacturer_repository.delete(manufacturer_id)
diff --git a/test/e2e/test_catalogue_category.py b/test/e2e/test_catalogue_category.py
index a1ba4b8f..957cf6c5 100644
--- a/test/e2e/test_catalogue_category.py
+++ b/test/e2e/test_catalogue_category.py
@@ -319,9 +319,10 @@ def test_delete_catalogue_category_with_child_catalogue_items(test_client):
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
+
     test_client.post("/v1/catalogue-items", json=catalogue_item_post)
 
     response = test_client.delete(f"/v1/catalogue-categories/{catalogue_category_id}")
@@ -574,7 +575,7 @@ def test_partial_update_catalogue_category_change_valid_when_has_child_catalogue
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     test_client.post("/v1/catalogue-items", json=catalogue_item_post)
@@ -694,7 +695,7 @@ def test_partial_update_catalogue_category_change_from_leaf_to_non_leaf_has_chil
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     test_client.post("/v1/catalogue-items", json=catalogue_item_post)
@@ -819,7 +820,7 @@ def test_partial_update_catalogue_category_change_parent_id_has_child_catalogue_
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     test_client.post("/v1/catalogue-items", json=catalogue_item_post)
@@ -1010,7 +1011,7 @@ def test_partial_update_catalogue_category_change_catalogue_item_properties_has_
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     test_client.post("/v1/catalogue-items", json=catalogue_item_post)
diff --git a/test/e2e/test_catalogue_item.py b/test/e2e/test_catalogue_item.py
index 303b503d..40834ed5 100644
--- a/test/e2e/test_catalogue_item.py
+++ b/test/e2e/test_catalogue_item.py
@@ -44,7 +44,7 @@ def get_catalogue_item_a_dict(catalogue_category_id: str) -> Dict:
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
 
@@ -66,7 +66,7 @@ def get_catalogue_item_b_dict(catalogue_category_id: str) -> Dict:
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
 
@@ -831,7 +831,7 @@ def test_partial_update_catalogue_item_change_manufacturer(test_client):
         "manufacturer": {
             "name": "Manufacturer B",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-b.co.uk",
+            "url": "https://www.manufacturer-b.co.uk",
         }
     }
     response = test_client.patch(f"/v1/catalogue-items/{response.json()['id']}", json=catalogue_item_patch)
diff --git a/test/e2e/test_manufacturer.py b/test/e2e/test_manufacturer.py
index e2331738..fa6399c8 100644
--- a/test/e2e/test_manufacturer.py
+++ b/test/e2e/test_manufacturer.py
@@ -186,3 +186,112 @@ def test_update_with_nonexistent_id(test_client):
     assert response.status_code == 422
 
     assert response.json()["detail"] == "The specified manufacturer does not exist"
+
+
+def test_update_duplicate_name(test_client):
+    """Test updating a manufacturer with a duplicate name"""
+    manufacturer_post = {
+        "name": "Manufacturer A",
+        "url": "http://example.com",
+        "address": "Street A",
+    }
+
+    response = test_client.post("/v1/manufacturer", json=manufacturer_post)
+
+    manufacturer_patch = {
+        "name": "Manufacturer A",
+        "url": "http://test.co.uk",
+        "address": "Street B",
+    }
+    response = test_client.patch(f"/v1/manufacturer/{response.json()['id']}", json=manufacturer_patch)
+
+    assert response.status_code == 409
+    assert response.json()["detail"] == "A manufacturer with the same name has been found"
+
+
+def test_delete(test_client):
+    """Test deleting a manufacturer"""
+    manufacturer_post = {
+        "name": "Manufacturer A",
+        "url": "http://example.com",
+        "address": "Street A",
+    }
+
+    response = test_client.post("/v1/manufacturer", json=manufacturer_post)
+    manufacturer = response.json()
+
+    response = test_client.delete(f"/v1/manufacturer/{manufacturer['id']}")
+    assert response.status_code == 204
+
+
+def test_delete_with_an_invalid_id(test_client):
+    """Test trying to delete a manufacturer with an invalid ID"""
+    manufacturer_post = {
+        "name": "Manufacturer A",
+        "url": "http://example.com",
+        "address": "Street A",
+    }
+    test_client.post("/v1/manufacturer", json=manufacturer_post)
+
+    response = test_client.delete("/v1/manufacturer/invalid")
+
+    assert response.status_code == 404
+    assert response.json()["detail"] == "The specified manufacturer does not exist"
+
+
+def test_delete_with_a_nonexistent_id(test_client):
+    """Test trying to delete a manufacturer with a non-existent ID"""
+    manufacturer_post = {
+        "name": "Manufacturer A",
+        "url": "http://example.com",
+        "address": "Street A",
+    }
+    test_client.post("/v1/manufacturer", json=manufacturer_post)
+
+    response = test_client.delete(f"/v1/manufacturer/{str(ObjectId())}")
+
+    assert response.status_code == 404
+    assert response.json()["detail"] == "The specified manufacturer does not exist"
+
+
+def test_delete_manufacturer_that_is_a_part_of_catalogue_item():
+    """Test trying to delete a manufacturer that is a part of a Catalogue Item"""
+    # pylint: disable=fixme
+    # TODO - Uncomment test when catalogue item logic changes back to using manufacturer Id
+
+    # manufacturer_post = {
+    #     "name": "Manufacturer A",
+    #     "url": "http://example.com",
+    #     "address": "Street A",
+    # }
+    # response = test_client.post("/v1/manufacturer", json=manufacturer_post)
+    # manufacturer_id = response.json()["id"]
+    # # pylint: disable=duplicate-code
+    # catalogue_category_post = {
+    #     "name": "Category A",
+    #     "is_leaf": True,
+    #     "catalogue_item_properties": [
+    #         {"name": "Property A", "type": "number", "unit": "mm", "mandatory": False},
+    #         {"name": "Property B", "type": "boolean", "mandatory": True},
+    #     ],
+    # }
+    # # pylint: enable=duplicate-code
+    # response = test_client.post("/v1/catalogue-categories", json=catalogue_category_post)
+
+    # # pylint: disable=duplicate-code
+    # catalogue_category_id = response.json()["id"]
+
+    # catalogue_item_post = {
+    #     "catalogue_category_id": catalogue_category_id,
+    #     "name": "Catalogue Item A",
+    #     "description": "This is Catalogue Item A",
+    #     "properties": [{"name": "Property B", "value": False}],
+    #     "manufacturer": manufacturer_post,
+    # }
+    # # pylint: enable=duplicate-code
+    # test_client.post("/v1/catalogue-items", json=catalogue_item_post)
+
+    # response = test_client.delete(f"/v1/manufacturer/{manufacturer_id}")
+
+    # assert response.status_code == 409
+    # assert response.json()["detail"] == "The specified manufacturer is a part of a Catalogue Item"
diff --git a/test/unit/repositories/conftest.py b/test/unit/repositories/conftest.py
index fd7dcbf1..9471a952 100644
--- a/test/unit/repositories/conftest.py
+++ b/test/unit/repositories/conftest.py
@@ -61,6 +61,8 @@ def fixture_manufacturer_repository(database_mock: Mock) -> ManufacturerRepo:
     Fixture to create ManufacturerRepo instance
     """
     return ManufacturerRepo(database_mock)
+
+
 @pytest.fixture(name="system_repository")
 def fixture_system_repository(database_mock: Mock) -> SystemRepo:
     """
@@ -164,6 +166,7 @@ def mock_update_one(collection_mock: Mock) -> None:
         update_one_result_mock.acknowledged = True
         collection_mock.insert_one.return_value = update_one_result_mock
 
+
 @pytest.fixture(name="test_helpers")
 def fixture_test_helpers() -> Type[RepositoryTestHelpers]:
     """
diff --git a/test/unit/repositories/test_catalogue_item.py b/test/unit/repositories/test_catalogue_item.py
index 1432ab9f..48373cae 100644
--- a/test/unit/repositories/test_catalogue_item.py
+++ b/test/unit/repositories/test_catalogue_item.py
@@ -35,7 +35,9 @@ def test_create(test_helpers, database_mock, catalogue_item_repository):
             Property(name="Property C", value="20x15x10", unit="cm"),
         ],
         manufacturer=Manufacturer(
-            name="Manufacturer A", address="1 Address, City, Country, Postcode", web_url="www.manufacturer-a.co.uk"
+            name="Manufacturer A",
+            address="1 Address, City, Country, Postcode",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
     # pylint: enable=duplicate-code
@@ -159,7 +161,9 @@ def test_get(test_helpers, database_mock, catalogue_item_repository):
             Property(name="Property C", value="20x15x10", unit="cm"),
         ],
         manufacturer=Manufacturer(
-            name="Manufacturer A", address="1 Address, City, Country, Postcode", web_url="www.manufacturer-a.co.uk"
+            name="Manufacturer A",
+            address="1 Address, City, Country, Postcode",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
     # pylint: enable=duplicate-code
@@ -229,7 +233,9 @@ def test_list(test_helpers, database_mock, catalogue_item_repository):
             Property(name="Property C", value="20x15x10", unit="cm"),
         ],
         manufacturer=Manufacturer(
-            name="Manufacturer A", address="1 Address, City, Country, Postcode", web_url="www.manufacturer-a.co.uk"
+            name="Manufacturer A",
+            address="1 Address, City, Country, Postcode",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
 
@@ -240,7 +246,9 @@ def test_list(test_helpers, database_mock, catalogue_item_repository):
         description="This is Catalogue Item B",
         properties=[Property(name="Property A", value=True)],
         manufacturer=Manufacturer(
-            name="Manufacturer A", address="1 Address, City, Country, Postcode", web_url="www.manufacturer-a.co.uk"
+            name="Manufacturer A",
+            address="1 Address, City, Country, Postcode",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
     # pylint: enable=duplicate-code
@@ -292,7 +300,9 @@ def test_list_with_catalogue_category_id_filter(test_helpers, database_mock, cat
             Property(name="Property C", value="20x15x10", unit="cm"),
         ],
         manufacturer=Manufacturer(
-            name="Manufacturer A", address="1 Address, City, Country, Postcode", web_url="www.manufacturer-a.co.uk"
+            name="Manufacturer A",
+            address="1 Address, City, Country, Postcode",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
 
@@ -371,7 +381,7 @@ def test_update(test_helpers, database_mock, catalogue_item_repository):
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     # pylint: enable=duplicate-code
diff --git a/test/unit/repositories/test_manufacturer.py b/test/unit/repositories/test_manufacturer.py
index 8f0657bb..6d8f4074 100644
--- a/test/unit/repositories/test_manufacturer.py
+++ b/test/unit/repositories/test_manufacturer.py
@@ -10,6 +10,7 @@
     DuplicateRecordError,
     InvalidObjectIdError,
     MissingRecordError,
+    PartOfCatalogueItemError,
 )
 from inventory_management_system_api.models.manufacturer import ManufacturerIn, ManufacturerOut
 
@@ -298,3 +299,65 @@ def test_update_with_nonexistent_id(test_helpers, database_mock, manufacturer_re
     with pytest.raises(MissingRecordError) as exc:
         manufacturer_repository.update(manufacturer_id, updated_manufacturer)
     assert str(exc.value) == "The specified manufacturer does not exist"
+
+
+def update_with_duplicate_name(test_helpers, database_mock, manufacturer_repository):
+    """Test trying to update a manufacturer with a duplicate name"""
+    # pylint: disable=duplicate-code
+    updated_manufacturer = ManufacturerIn(
+        name="Manufacturer B",
+        code="manufacturer-b",
+        url="http://testUrl.co.uk",
+        address="1 Example street",
+    )
+    # pylint: enable=duplicate-code
+    manufacturer_id = str(ObjectId())
+    test_helpers.mock_count_documents(database_mock.manufacturer, 1)
+
+    with pytest.raises(DuplicateRecordError) as exc:
+        manufacturer_repository.update(manufacturer_id, updated_manufacturer)
+    assert str(exc.value) == "The specified manufacturer does not exist"
+
+
+def test_delete(test_helpers, database_mock, manufacturer_repository):
+    """Test trying to delete a manufacturer"""
+    manufacturer_id = str(ObjectId())
+
+    test_helpers.mock_delete_one(database_mock.manufacturer, 1)
+    test_helpers.mock_count_documents(database_mock.catalogue_items, 0)
+    manufacturer_repository.delete(manufacturer_id)
+
+    database_mock.manufacturer.delete_one.assert_called_once_with({"_id": CustomObjectId(manufacturer_id)})
+
+
+def test_delete_with_an_invalid_id(manufacturer_repository):
+    """Test trying to delete a manufacturer with an invalid ID"""
+    manufacturer_id = "invalid"
+
+    with pytest.raises(InvalidObjectIdError) as exc:
+        manufacturer_repository.delete(manufacturer_id)
+    assert str(exc.value) == "Invalid ObjectId value 'invalid'"
+
+
+def test_delete_with_a_nonexistent_id(test_helpers, database_mock, manufacturer_repository):
+    """Test trying to delete a manufacturer with a non-existent ID"""
+    manufacturer_id = str(ObjectId())
+
+    test_helpers.mock_delete_one(database_mock.manufacturer, 0)
+    test_helpers.mock_count_documents(database_mock.catalogue_items, 0)
+
+    with pytest.raises(MissingRecordError) as exc:
+        manufacturer_repository.delete(manufacturer_id)
+    assert str(exc.value) == f"No manufacturer found with ID: {manufacturer_id}"
+    database_mock.manufacturer.delete_one.assert_called_once_with({"_id": CustomObjectId(manufacturer_id)})
+
+
+def test_delete_manufacturer_that_is_part_of_an_catalogue_item(test_helpers, database_mock, manufacturer_repository):
+    """Test trying to delete a manufacturer that is part of a Catalogue Items"""
+    manufacturer_id = str(ObjectId())
+
+    test_helpers.mock_count_documents(database_mock.catalogue_items, 1)
+
+    with pytest.raises(PartOfCatalogueItemError) as exc:
+        manufacturer_repository.delete(manufacturer_id)
+    assert str(exc.value) == "The specified manufacturer is a part of a Catalogue Item"
diff --git a/test/unit/services/conftest.py b/test/unit/services/conftest.py
index 32c3ac68..9531b425 100644
--- a/test/unit/services/conftest.py
+++ b/test/unit/services/conftest.py
@@ -15,6 +15,7 @@
 from inventory_management_system_api.schemas.breadcrumbs import BreadcrumbsGetSchema
 from inventory_management_system_api.services.catalogue_category import CatalogueCategoryService
 from inventory_management_system_api.services.catalogue_item import CatalogueItemService
+from inventory_management_system_api.services.manufacturer import ManufacturerService
 from inventory_management_system_api.services.system import SystemService
 
 
@@ -47,6 +48,7 @@ def fixture_manufacturer_repository_mock() -> Mock:
     """
     return Mock(ManufacturerRepo)
 
+
 @pytest.fixture(name="system_repository_mock")
 def fixture_system_repository_mock() -> Mock:
     """
@@ -83,6 +85,17 @@ def fixture_catalogue_item_service(
     return CatalogueItemService(catalogue_item_repository_mock, catalogue_category_repository_mock)
 
 
+@pytest.fixture(name="manufacturer_service")
+def fixture_manufacturer_service(manufacturer_repository_mock: Mock) -> ManufacturerService:
+    """
+    Fixture to create a `ManufacturerService` instance with a mocked `ManufacturerRepo`
+
+    :param: manufacturer_repository_mock: Mocked `ManufacturerRepo` instance.
+    :return: `ManufacturerService` instance with mocked dependency
+    """
+    return ManufacturerService(manufacturer_repository_mock)
+
+
 @pytest.fixture(name="system_service")
 def fixture_system_service(system_repository_mock: Mock) -> SystemService:
     """
diff --git a/test/unit/services/test_catalogue_item.py b/test/unit/services/test_catalogue_item.py
index d4e4c46b..3e0db937 100644
--- a/test/unit/services/test_catalogue_item.py
+++ b/test/unit/services/test_catalogue_item.py
@@ -16,14 +16,13 @@
 from inventory_management_system_api.models.catalogue_category import CatalogueCategoryOut, CatalogueItemProperty
 from inventory_management_system_api.models.catalogue_item import (
     CatalogueItemOut,
+    Manufacturer,
     Property,
     CatalogueItemIn,
-    Manufacturer,
 )
 from inventory_management_system_api.schemas.catalogue_item import (
     PropertyPostRequestSchema,
     CatalogueItemPostRequestSchema,
-    ManufacturerSchema,
     CatalogueItemPatchRequestSchema,
 )
 
@@ -52,7 +51,7 @@ def test_create(
         manufacturer=Manufacturer(
             name="Manufacturer A",
             address="1 Address, City, Country, Postcode",
-            web_url="https://www.manufacturer-a.co.uk",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
 
@@ -130,13 +129,14 @@ def test_create_with_nonexistent_catalogue_category_id(
                     PropertyPostRequestSchema(name="Property B", value=False),
                     PropertyPostRequestSchema(name="Property C", value="20x15x10"),
                 ],
-                manufacturer=ManufacturerSchema(
+                manufacturer=Manufacturer(
                     name="Manufacturer A",
                     address="1 Address, City, Country, Postcode",
-                    web_url="https://www.manufacturer-a.co.uk",
+                    url="https://www.manufacturer-a.co.uk",
                 ),
-            )
+            ),
         )
+
     assert str(exc.value) == f"No catalogue category found with ID: {catalogue_category_id}"
     catalogue_category_repository_mock.get.assert_called_once_with(catalogue_category_id)
 
@@ -176,13 +176,14 @@ def test_create_in_non_leaf_catalogue_category(
                     PropertyPostRequestSchema(name="Property B", value=False),
                     PropertyPostRequestSchema(name="Property C", value="20x15x10"),
                 ],
-                manufacturer=ManufacturerSchema(
+                manufacturer=Manufacturer(
                     name="Manufacturer A",
                     address="1 Address, City, Country, Postcode",
-                    web_url="https://www.manufacturer-a.co.uk",
+                    url="https://www.manufacturer-a.co.uk",
                 ),
-            )
+            ),
         )
+
     assert str(exc.value) == "Cannot add catalogue item to a non-leaf catalogue category"
     catalogue_category_repository_mock.get.assert_called_once_with(catalogue_category.id)
 
@@ -205,9 +206,10 @@ def test_create_without_properties(
         manufacturer=Manufacturer(
             name="Manufacturer A",
             address="1 Address, City, Country, Postcode",
-            web_url="https://www.manufacturer-a.co.uk",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
+
     # pylint: enable=duplicate-code
 
     # Mock `get` to return the catalogue category
@@ -288,13 +290,14 @@ def test_create_with_missing_mandatory_properties(
                 properties=[
                     PropertyPostRequestSchema(name="Property C", value="20x15x10"),
                 ],
-                manufacturer=ManufacturerSchema(
+                manufacturer=Manufacturer(
                     name="Manufacturer A",
                     address="1 Address, City, Country, Postcode",
-                    web_url="https://www.manufacturer-a.co.uk",
+                    url="https://www.manufacturer-a.co.uk",
                 ),
-            )
+            ),
         )
+
     assert (
         str(exc.value)
         == f"Missing mandatory catalogue item property: '{catalogue_category.catalogue_item_properties[1].name}'"
@@ -342,13 +345,14 @@ def test_create_with_with_invalid_value_type_for_string_property(
                     PropertyPostRequestSchema(name="Property B", value=False),
                     PropertyPostRequestSchema(name="Property C", value=True),
                 ],
-                manufacturer=ManufacturerSchema(
+                manufacturer=Manufacturer(
                     name="Manufacturer A",
                     address="1 Address, City, Country, Postcode",
-                    web_url="https://www.manufacturer-a.co.uk",
+                    url="https://www.manufacturer-a.co.uk",
                 ),
-            )
+            ),
         )
+
     assert (
         str(exc.value)
         == f"Invalid value type for catalogue item property '{catalogue_category.catalogue_item_properties[2].name}'. "
@@ -397,10 +401,10 @@ def test_create_with_with_invalid_value_type_for_number_property(
                     PropertyPostRequestSchema(name="Property B", value=False),
                     PropertyPostRequestSchema(name="Property C", value="20x15x10"),
                 ],
-                manufacturer=ManufacturerSchema(
+                manufacturer=Manufacturer(
                     name="Manufacturer A",
                     address="1 Address, City, Country, Postcode",
-                    web_url="https://www.manufacturer-a.co.uk",
+                    url="https://www.manufacturer-a.co.uk",
                 ),
             )
         )
@@ -452,10 +456,10 @@ def test_create_with_with_invalid_value_type_for_boolean_property(
                     PropertyPostRequestSchema(name="Property B", value="False"),
                     PropertyPostRequestSchema(name="Property C", value="20x15x10"),
                 ],
-                manufacturer=ManufacturerSchema(
+                manufacturer=Manufacturer(
                     name="Manufacturer A",
                     address="1 Address, City, Country, Postcode",
-                    web_url="https://www.manufacturer-a.co.uk",
+                    url="https://www.manufacturer-a.co.uk",
                 ),
             )
         )
@@ -500,7 +504,7 @@ def test_get(test_helpers, catalogue_item_repository_mock, catalogue_item_servic
         manufacturer=Manufacturer(
             name="Manufacturer A",
             address="1 Address, City, Country, Postcode",
-            web_url="https://www.manufacturer-a.co.uk",
+            url="https://www.manufacturer-a.co.uk",
         ),
     )
     # pylint: enable=duplicate-code
@@ -545,7 +549,6 @@ def test_list(catalogue_item_repository_mock, catalogue_item_service):
     catalogue_item_repository_mock.list.assert_called_once_with(catalogue_category_id)
     assert result == catalogue_item_repository_mock.list.return_value
 
-
 def test_update(test_helpers, catalogue_item_repository_mock, catalogue_item_service):
     """
     Test updating a catalogue item.
@@ -564,7 +567,7 @@ def test_update(test_helpers, catalogue_item_repository_mock, catalogue_item_ser
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     # pylint: enable=duplicate-code
@@ -632,7 +635,7 @@ def test_update_change_catalogue_category_id_same_defined_properties_without_sup
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     full_catalogue_item_info = {
@@ -694,7 +697,7 @@ def test_update_change_catalogue_category_id_same_defined_properties_with_suppli
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     full_catalogue_item_info = {
@@ -770,7 +773,7 @@ def test_update_change_catalogue_category_id_different_defined_properties_withou
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
@@ -827,7 +830,7 @@ def test_update_change_catalogue_category_id_different_defined_properties_with_s
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
     }
     full_catalogue_item_info = {
@@ -899,7 +902,7 @@ def test_update_with_nonexistent_catalogue_category_id(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [],
     }
@@ -932,7 +935,7 @@ def test_update_change_catalogue_category_id_non_leaf_catalogue_category(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [],
     }
@@ -979,7 +982,7 @@ def test_update_add_non_mandatory_property(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property B", "value": False},
@@ -1045,7 +1048,7 @@ def test_update_remove_non_mandatory_property(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
@@ -1109,7 +1112,7 @@ def test_update_remove_mandatory_property(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
@@ -1167,7 +1170,7 @@ def test_update_change_property_value(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
@@ -1234,7 +1237,7 @@ def test_update_change_value_for_string_property_invalid_type(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
@@ -1291,7 +1294,7 @@ def test_update_change_value_for_number_property_invalid_type(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
@@ -1348,7 +1351,7 @@ def test_update_change_value_for_boolean_property_invalid_type(
         "manufacturer": {
             "name": "Manufacturer A",
             "address": "1 Address, City, Country, Postcode",
-            "web_url": "https://www.manufacturer-a.co.uk",
+            "url": "https://www.manufacturer-a.co.uk",
         },
         "properties": [
             {"name": "Property A", "value": 20, "unit": "mm"},
diff --git a/test/unit/services/test_manufacturer.py b/test/unit/services/test_manufacturer.py
index b48a5f49..65b6ce2d 100644
--- a/test/unit/services/test_manufacturer.py
+++ b/test/unit/services/test_manufacturer.py
@@ -2,24 +2,10 @@
 Unit tests for the `ManufacturerService` service.
 """
 
-from unittest.mock import Mock
-import pytest
 from bson import ObjectId
 
 from inventory_management_system_api.models.manufacturer import ManufacturerIn, ManufacturerOut
 from inventory_management_system_api.schemas.manufacturer import ManufacturerPostRequestSchema
-from inventory_management_system_api.services.manufacturer import ManufacturerService
-
-
-@pytest.fixture(name="manufacturer_service")
-def fixture_manufacturer_service(manufacturer_repository_mock: Mock) -> ManufacturerService:
-    """
-    Fixture to create a `ManufacturerService` instance with a mocked `ManufacturerRepo`
-
-    :param: manufacturer_repository_mock: Mocked `ManufacturerRepo` instance.
-    :return: `ManufacturerService` instance with mocked dependency
-    """
-    return ManufacturerService(manufacturer_repository_mock)
 
 
 def test_create(manufacturer_repository_mock, manufacturer_service):
@@ -111,3 +97,11 @@ def test_get_with_nonexistent_id(manufacturer_repository_mock, manufacturer_serv
     assert retrieved_manufacturer is None
 
     manufacturer_repository_mock.get.assert_called_once_with(manufactuer_id)
+
+
+def test_delete(manufacturer_repository_mock, manufacturer_service):
+    """Test deleting a manufacturer"""
+    manufacturer_id = str(ObjectId())
+    manufacturer_service.delete(manufacturer_id)
+
+    manufacturer_repository_mock.delete.assert_called_once_with(manufacturer_id)