diff --git a/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.test.tsx b/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.test.tsx
index 256dff7063..86504baec4 100644
--- a/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.test.tsx
+++ b/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.test.tsx
@@ -1,21 +1,31 @@
 import ErrorFallback from "components/Error/ErrorFallback";
+import { useStore } from "pages/FlowEditor/lib/store";
 import React from "react";
+import { act } from "react-dom/test-utils";
 import { ErrorBoundary } from "react-error-boundary";
+import swr from "swr";
 import { setup } from "testUtils";
 import { vi } from "vitest";
 import { axe } from "vitest-axe";
 
 import classifiedRoadsResponseMock from "./mocks/classifiedRoadsResponseMock";
 import digitalLandResponseMock from "./mocks/digitalLandResponseMock";
+import { breadcrumbsWithoutUSRN, simpleBreadcrumbs, simpleFlow } from "./mocks/simpleFlow";
 import PlanningConstraints from "./Public";
 
+const { setState } = useStore;
+
+beforeEach(() => vi.clearAllMocks());
+
+const swrMock = (swr as jest.Mock).mock;
+
 vi.mock("swr", () => ({
   default: vi.fn((url: () => string) => {
     const isGISRequest = url()?.startsWith(
-      `${import.meta.env.VITE_APP_API_URL}/gis/`,
+      `${import.meta.env.VITE_APP_API_URL}/gis`,
     );
     const isRoadsRequest = url()?.startsWith(
-      `${import.meta.env.VITE_APP_API_URL}/roads/`,
+      `${import.meta.env.VITE_APP_API_URL}/roads`,
     );
 
     if (isGISRequest) return { data: digitalLandResponseMock };
@@ -27,8 +37,6 @@ vi.mock("swr", () => ({
 
 describe("error state", () => {
   it("renders an error if no addres is present in the passport", async () => {
-    const handleSubmit = vi.fn();
-
     const { getByRole, getByTestId } = setup(
       <ErrorBoundary FallbackComponent={ErrorFallback}>
         <PlanningConstraints
@@ -36,9 +44,8 @@ describe("error state", () => {
           description="Things that might affect your project"
           fn="property.constraints.planning"
           disclaimer="This page does not include information about historic planning conditions that may apply to this property."
-          handleSubmit={handleSubmit}
+          handleSubmit={vi.fn()}
         />
-        ,
       </ErrorBoundary>,
     );
 
@@ -55,7 +62,6 @@ describe("error state", () => {
           fn="property.constraints.planning"
           disclaimer="This page does not include information about historic planning conditions that may apply to this property."
         />
-        ,
       </ErrorBoundary>,
     );
     const results = await axe(container);
@@ -63,10 +69,168 @@ describe("error state", () => {
   });
 });
 
-it.todo("renders correctly");
+describe("following a FindProperty component", () => {
+  beforeEach(() => {
+    act(() =>
+      setState({
+        breadcrumbs: simpleBreadcrumbs,
+        flow: simpleFlow,
+        teamIntegrations: {
+          hasPlanningData: true,
+        },
+      }),
+    );
+  });
+
+  it("renders correctly", async () => {
+    const handleSubmit = vi.fn();
+
+    const { user, getByRole, getByTestId } = setup(
+      <PlanningConstraints
+        title="Planning constraints"
+        description="Things that might affect your project"
+        fn="property.constraints.planning"
+        disclaimer="This page does not include information about historic planning conditions that may apply to this property."
+        handleSubmit={handleSubmit}
+      />,
+    );
+
+    expect(
+      getByRole("heading", { name: "Planning constraints" }),
+    ).toBeInTheDocument();
+
+    await user.click(getByTestId("continue-button"));
 
-it.todo("should not have any accessibility violations");
+    expect(handleSubmit).toHaveBeenCalled();
+  });
 
-it.todo("fetches classified roads only when we have a siteBoundary"); // using expect(spy).toHaveBeenCalled() ??
+  it("should not have any accessibility violations", async () => {
+    const { container } = setup(
+      <PlanningConstraints
+        title="Planning constraints"
+        description="Things that might affect your project"
+        fn="property.constraints.planning"
+        disclaimer="This page does not include information about historic planning conditions that may apply to this property."
+      />,
+    );
+    const results = await axe(container);
+    expect(results).toHaveNoViolations();
+  });
+
+  it("fetches planning constraints when we have lng, lat or siteBoundary", async () => {
+    setup(
+      <PlanningConstraints
+        title="Planning constraints"
+        description="Things that might affect your project"
+        fn="property.constraints.planning"
+        disclaimer="This page does not include information about historic planning conditions that may apply to this property."
+        handleSubmit={vi.fn()}
+      />,
+    );
+
+    expect(swr).toHaveBeenCalled();
+
+    // Planning data is called first
+    const swrURL = swrMock.calls[0][0]();
+    const swrResponse = swrMock.results[0].value;
+
+    expect(swrURL).toContain("/gis");
+    expect(swrResponse).toEqual({ data: digitalLandResponseMock });
+  });
 
-it.todo("fetches planning constraints when we have lng,lat or siteBoundary");
+  it("fetches classified roads when a USRN is provided", () => {
+    setup(
+      <PlanningConstraints
+        title="Planning constraints"
+        description="Things that might affect your project"
+        fn="property.constraints.planning"
+        disclaimer="This page does not include information about historic planning conditions that may apply to this property."
+        handleSubmit={vi.fn()}
+      />,
+    );
+
+    expect(swr).toHaveBeenCalled();
+
+    // Classified roads are called second
+    const swrURL = swrMock.calls[1][0]();
+    const swrResponse = swrMock.results[1].value;
+
+    expect(swrURL).toContain("/roads");
+    expect(swrResponse).toEqual({ data: classifiedRoadsResponseMock });
+  });
+
+  it("does not fetch classified roads when a USRN is not provided", async () => {
+    act(() =>
+      setState({
+        breadcrumbs: breadcrumbsWithoutUSRN,
+        flow: simpleFlow,
+        teamIntegrations: {
+          hasPlanningData: true,
+        },
+      })
+    );
+
+    setup(
+      <PlanningConstraints
+        title="Planning constraints"
+        description="Things that might affect your project"
+        fn="property.constraints.planning"
+        disclaimer="This page does not include information about historic planning conditions that may apply to this property."
+        handleSubmit={vi.fn()}
+      />,
+    );
+
+    expect(swr).toHaveBeenCalled();
+
+    // Planning constraints API still called
+    const planingConstraintsURL = swrMock.calls[0][0]();
+    const planingConstraintsResponse = swrMock.results[0].value;
+
+    expect(planingConstraintsURL).toContain("/gis");
+    expect(planingConstraintsResponse).toEqual({ data: digitalLandResponseMock });
+
+    // Classified roads API not called due to missing USRN
+    const swrURL = swrMock.calls[1][0]();
+    const swrResponse = swrMock.results[1].value;
+
+    expect(swrURL).toBeNull();
+    expect(swrResponse).toEqual({ data: null });
+  });
+
+  test("basic layout and interactions", async () => {
+    const { user, getByRole, queryByRole, getByTestId } = setup(
+      <PlanningConstraints
+        title="Planning constraints"
+        description="Things that might affect your project"
+        fn="property.constraints.planning"
+        disclaimer="This page does not include information about historic planning conditions that may apply to this property."
+        handleSubmit={vi.fn()}
+      />,
+    );
+
+    // Positive constraints visible by default
+    expect(
+      getByRole("heading", { name: /These are the planning constraints/ }),
+    ).toBeVisible();
+    expect(getByRole("button", { name: /Parks and gardens/ })).toBeVisible();
+
+    // Negative constraints hidden by default
+    const showNegativeConstraintsButton = getByRole("button", {
+      name: /Constraints that don't apply/,
+    });
+    expect(showNegativeConstraintsButton).toBeVisible();
+
+    const negativeConstraintsContainer = getByTestId(
+      "negative-constraints-list",
+    );
+    expect(negativeConstraintsContainer).not.toBeVisible();
+
+    expect(queryByRole("heading", { name: /Ecology/ })).not.toBeInTheDocument();
+
+    // Negative constraints viewable on toggle
+    await user.click(showNegativeConstraintsButton);
+
+    expect(negativeConstraintsContainer).toBeVisible();
+    expect(getByRole("heading", { name: /Ecology/ })).toBeVisible();
+  });
+});
\ No newline at end of file
diff --git a/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.tsx b/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.tsx
index 513961d632..2cfcf8fbbd 100644
--- a/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.tsx
+++ b/editor.planx.uk/src/@planx/components/PlanningConstraints/Public.tsx
@@ -302,6 +302,7 @@ export function PlanningConstraintsContent(
           {negativeConstraints.length > 0 && (
             <SimpleExpand
               id="negative-constraints-list"
+              data-testid="negative-constraints-list"
               buttonText={{
                 open: "Constraints that don't apply to this property",
                 closed: "Hide constraints that don't apply",
diff --git a/editor.planx.uk/src/@planx/components/PlanningConstraints/mocks/simpleFlow.ts b/editor.planx.uk/src/@planx/components/PlanningConstraints/mocks/simpleFlow.ts
new file mode 100644
index 0000000000..ae7a984bea
--- /dev/null
+++ b/editor.planx.uk/src/@planx/components/PlanningConstraints/mocks/simpleFlow.ts
@@ -0,0 +1,98 @@
+import { cloneDeep, merge } from "lodash";
+import { Store } from "pages/FlowEditor/lib/store";
+
+export const simpleFlow: Store.Flow = {
+  _root: {
+    edges: ["findProperty", "planningConstraints"],
+  },
+  findProperty: {
+    type: 9,
+    data: {
+      title: "Find the property",
+      allowNewAddresses: false,
+      newAddressTitle:
+        "Click or tap at where the property is on the map and name it below",
+      newAddressDescription:
+        "You will need to select a location and provide a name to continue",
+      newAddressDescriptionLabel: "Name the site",
+    },
+  },
+  planningConstraints: {
+    type: 11,
+    data: {
+      title: "Planning constraints",
+      description:
+        "Planning constraints might limit how you can develop or use the property",
+      fn: "property.constraints.planning",
+      disclaimer:
+        "<p><strong>This page does not include information about historic planning conditions that may apply to this property.</strong></p>",
+    },
+  },
+};
+
+export const simpleBreadcrumbs: Store.Breadcrumbs = {
+  findProperty: {
+    auto: false,
+    data: {
+      _address: {
+        uprn: "100071417680",
+        usrn: "2702440",
+        blpu_code: "2",
+        latitude: 52.4804358,
+        longitude: -1.9034539,
+        organisation: null,
+        sao: "",
+        saoEnd: "",
+        pao: "COUNCIL HOUSE",
+        paoEnd: "",
+        street: "VICTORIA SQUARE",
+        town: "BIRMINGHAM",
+        postcode: "B1 1BB",
+        ward: "E05011151",
+        x: 406653.64,
+        y: 286948.41,
+        planx_description: "Local Government Service",
+        planx_value: "commercial.office.workspace.gov.local",
+        single_line_address:
+          "COUNCIL HOUSE, VICTORIA SQUARE, BIRMINGHAM, B1 1BB",
+        title: "COUNCIL HOUSE, VICTORIA SQUARE",
+        source: "os",
+      },
+      "property.type": ["commercial.office.workspace.gov.local"],
+      "property.localAuthorityDistrict": ["Birmingham"],
+      "property.region": ["West Midlands"],
+      "property.boundary.title": {
+        geometry: {
+          type: "MultiPolygon",
+          coordinates: [
+            [
+              [
+                [-1.903955, 52.480237],
+                [-1.903881, 52.480179],
+                [-1.903955, 52.480237],
+              ],
+            ],
+          ],
+        },
+        type: "Feature",
+        properties: {
+          "entry-date": "2024-05-06",
+          "start-date": "2021-03-25",
+          "end-date": "",
+          entity: 12001049997,
+          name: "",
+          dataset: "title-boundary",
+          typology: "geography",
+          reference: "61385289",
+          prefix: "title-boundary",
+          "organisation-entity": "13",
+        },
+      },
+      "property.boundary.title.area": 8242.37,
+      "property.boundary.title.area.hectares": 0.8242370000000001,
+      "findProperty.action": "Selected an existing address",
+    },
+  },
+};
+
+export const breadcrumbsWithoutUSRN = merge(cloneDeep(simpleBreadcrumbs), { findProperty: { data: { _address: { usrn: null }}}});
\ No newline at end of file
diff --git a/editor.planx.uk/src/@planx/components/shared/Preview/SimpleExpand.tsx b/editor.planx.uk/src/@planx/components/shared/Preview/SimpleExpand.tsx
index beb2475701..2bc82c9396 100644
--- a/editor.planx.uk/src/@planx/components/shared/Preview/SimpleExpand.tsx
+++ b/editor.planx.uk/src/@planx/components/shared/Preview/SimpleExpand.tsx
@@ -48,7 +48,7 @@ const SimpleExpand: React.FC<PropsWithChildren<Props>> = ({
           />
         </StyledButton>
       </Box>
-      <Collapse in={show} id={id}>
+      <Collapse in={show} id={id} data-testid={id}>
         {children}
       </Collapse>
     </>