diff --git a/editor.planx.uk/src/@planx/graph/__tests__/formatOps.test.ts b/editor.planx.uk/src/@planx/graph/__tests__/formatOps.test.ts
new file mode 100644
index 0000000000..da63f1a4b3
--- /dev/null
+++ b/editor.planx.uk/src/@planx/graph/__tests__/formatOps.test.ts
@@ -0,0 +1,269 @@
+import { formatOps,Graph } from "../index";
+
+describe("Update operations", () => {
+  test("Updating a single property of a node", () => {
+    const ops = [
+      {
+        p: ["FW5G3EMBI3", "data", "text"],
+        oi: "Which vegetables?",
+        od: "Which fruits?",
+      },
+    ];
+
+    expect(formatOps(flowWithChecklist, ops)).toEqual([
+      'Updated Checklist text from "Which fruits?" to "Which vegetables?"',
+    ]);
+  });
+
+  test("Updating many properties of a node", () => {
+    const ops = [
+      {
+        p: ["FW5G3EMBI3", "data", "fn"],
+        oi: "fruit",
+      },
+      {
+        p: ["WDwUTbF7Gq", "data", "val"],
+        oi: "berry.blue",
+      },
+      {
+        p: ["xTBfSd1Tjy", "data", "val"],
+        oi: "banana",
+      },
+    ];
+
+    expect(formatOps(flowWithChecklist, ops)).toEqual([
+      'Added Checklist fn "fruit"',
+      'Added Answer val "berry.blue"',
+      'Added Answer val "banana"',
+    ]);
+  });
+});
+
+describe("Insert operations", () => {
+  test("Adding a new node to the graph", () => {
+    const ops = [
+      {
+        p: ["_root", "edges", 0],
+        li: "ubCTG9OtFw",
+      },
+      {
+        p: ["ubCTG9OtFw"],
+        oi: {
+          type: 8,
+          data: {
+            title: "This is a test",
+            color: "#c81bcb",
+            resetButton: false,
+          },
+        },
+      },
+    ];
+
+    expect(formatOps(emptyFlow, ops)).toEqual([
+      'Added Notice "This is a test"',
+    ]);
+  });
+
+  test("Adding a new node and its' children to the graph", () => {
+    const ops = [
+      {
+        p: ["_root", "edges", 0],
+        li: "FW5G3EMBI3",
+      },
+      {
+        p: ["FW5G3EMBI3"],
+        oi: {
+          type: 105,
+          data: {
+            allRequired: false,
+            text: "Which fruits?",
+          },
+          edges: ["WDwUTbF7Gq", "SO5XbLwSYp", "xTBfSd1Tjy"],
+        },
+      },
+      {
+        p: ["WDwUTbF7Gq"],
+        oi: {
+          data: {
+            text: "Blueberry",
+          },
+          type: 200,
+        },
+      },
+      {
+        p: ["SO5XbLwSYp"],
+        oi: {
+          data: {
+            text: "Orange",
+          },
+          type: 200,
+        },
+      },
+      {
+        p: ["xTBfSd1Tjy"],
+        oi: {
+          data: {
+            text: "Banana",
+          },
+          type: 200,
+        },
+      },
+    ];
+
+    expect(formatOps(emptyFlow, ops)).toEqual([
+      'Added Checklist "Which fruits?"',
+      'Added Answer "Blueberry"',
+      'Added Answer "Orange"',
+      'Added Answer "Banana"',
+    ]);
+  });
+
+  test("Adding a new child and data property to an existing node", () => {
+    const ops = [
+      {
+        p: ["FW5G3EMBI3", "data", "description"],
+        oi: "<p>Fruits contain seeds and come from the flower of a plant</p>",
+      },
+      {
+        p: ["FW5G3EMBI3", "edges"],
+        oi: ["WDwUTbF7Gq", "SO5XbLwSYp", "xTBfSd1Tjy", "zzQAMXexRj"],
+        od: ["WDwUTbF7Gq", "SO5XbLwSYp", "xTBfSd1Tjy"],
+      },
+      {
+        p: ["zzQAMXexRj"],
+        oi: {
+          data: {
+            text: "Strawberry",
+          },
+          type: 200,
+        },
+      },
+    ];
+
+    expect(formatOps(flowWithChecklist, ops)).toEqual([
+      'Added Checklist description "<p>Fruits contain seeds and come from the flower of a plant</p>"',
+      "Updated order of Checklist edges",
+      'Added Answer "Strawberry"',
+    ]);
+  });
+});
+
+describe("Delete operations", () => {
+  test("Deleting a node from the graph", () => {
+    const ops = [
+      {
+        p: ["_root", "edges", 1],
+        ld: "FW5G3EMBI3",
+      },
+      {
+        p: ["WDwUTbF7Gq"],
+        od: {
+          data: {
+            text: "Blueberry",
+          },
+          type: 200,
+        },
+      },
+      {
+        p: ["SO5XbLwSYp"],
+        od: {
+          data: {
+            text: "Orange",
+          },
+          type: 200,
+        },
+      },
+      {
+        p: ["xTBfSd1Tjy"],
+        od: {
+          data: {
+            text: "Banana",
+          },
+          type: 200,
+        },
+      },
+      {
+        p: ["FW5G3EMBI3"],
+        od: {
+          type: 105,
+          data: {
+            allRequired: false,
+            text: "Which fruits?",
+          },
+          edges: ["wBwRtMce7c", "SO5XbLwSYp", "xTBfSd1Tjy"],
+        },
+      },
+    ];
+
+    expect(formatOps(flowWithChecklist, ops)).toEqual([
+      'Deleted Answer "Blueberry"',
+      'Deleted Answer "Orange"',
+      'Deleted Answer "Banana"',
+      'Deleted Checklist "Which fruits?"',
+    ]);
+  });
+
+  test("Deleting a child of a node", () => {
+    const ops = [
+      {
+        p: ["FW5G3EMBI3", "edges"],
+        oi: ["WDwUTbF7Gq", "xTBfSd1Tjy"],
+        od: ["WDwUTbF7Gq", "SO5XbLwSYp", "xTBfSd1Tjy"],
+      },
+      {
+        p: ["SO5XbLwSYp"],
+        od: {
+          data: {
+            text: "Orange",
+          },
+          type: 200,
+        },
+      },
+    ];
+
+    expect(formatOps(flowWithChecklist, ops)).toEqual([
+      "Updated order of Checklist edges",
+      'Deleted Answer "Orange"',
+    ]);
+  });
+
+  test.todo("Deleting a data property of an existing node");
+});
+
+const emptyFlow: Graph = {
+  _root: {
+    edges: [],
+  },
+};
+
+const flowWithChecklist: Graph = {
+  _root: {
+    edges: ["FW5G3EMBI3"],
+  },
+  FW5G3EMBI3: {
+    type: 105,
+    data: {
+      allRequired: false,
+      text: "Which fruits?",
+    },
+    edges: ["WDwUTbF7Gq", "SO5XbLwSYp", "xTBfSd1Tjy"],
+  },
+  WDwUTbF7Gq: {
+    data: {
+      text: "Blueberry",
+    },
+    type: 200,
+  },
+  SO5XbLwSYp: {
+    data: {
+      text: "Orange",
+    },
+    type: 200,
+  },
+  xTBfSd1Tjy: {
+    data: {
+      text: "Banana",
+    },
+    type: 200,
+  },
+};
diff --git a/editor.planx.uk/src/@planx/graph/index.ts b/editor.planx.uk/src/@planx/graph/index.ts
index e58b997c43..86f14585ba 100644
--- a/editor.planx.uk/src/@planx/graph/index.ts
+++ b/editor.planx.uk/src/@planx/graph/index.ts
@@ -6,7 +6,6 @@ import trim from "lodash/trim";
 import zip from "lodash/zip";
 import { customAlphabet } from "nanoid-good";
 import en from "nanoid-good/locale/en";
-import { TYPE } from "react-toastify/dist/utils";
 
 import { ImmerJSONPatch, OT } from "./types";
 
@@ -532,7 +531,9 @@ export const formatOps = (graph: Graph, ops: any[]): string[] => {
           );
         }
       } else if (op.p.includes("edges")) {
-        output.push(`Updated order of nodes`);
+        output.push(
+          `Updated order of ${node.type ? TYPES[node.type] : "graph"} edges`,
+        );
       }
       // Adding (inserting) an object or its properties
     } else if (Object.keys(op).includes("oi")) {
@@ -559,7 +560,9 @@ export const formatOps = (graph: Graph, ops: any[]): string[] => {
     } else if (Object.keys(op).includes("od")) {
       if (op.od.type) {
         output.push(
-          `Deleted ${TYPES} "${op.od.data?.title || op.od.data?.text}"`,
+          `Deleted ${TYPES[op.od.type]} "${
+            op.od.data?.title || op.od.data?.text
+          }"`,
         );
       } else if (op.p.includes("data")) {
         if (node.type) {
@@ -574,13 +577,13 @@ export const formatOps = (graph: Graph, ops: any[]): string[] => {
           output.push(`Deleted node from branch`);
         }
       }
-      // Updating the _root list (update = list insert + list delete)
+      // Updating the _root list (update = list insert or list delete)
     } else if (
       Object.keys(op).includes("li") &&
       Object.keys(op).includes("ld")
     ) {
       if (op.p.includes("edges") && op.p.includes("_root")) {
-        output.push(`Re-ordered _root nodes`);
+        output.push(`Re-ordered the graph`);
       }
     }
   });