diff --git a/CHANGES.md b/CHANGES.md
index d1fad5a48..e6bea810a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -10,6 +10,15 @@ creating a new release entry be sure to copy & paste the span tag with the
 `actions:bind` attribute, which is used by a regex to find the text to be
 updated. Only the first match gets replaced, so it's fine to leave the old
 ones in. -->
+
+-------------------------------------------------------------------------------
+## __cylc-ui-2.2.0 (<span actions:bind='release-date'>Upcoming</span>)__
+
+### Enhancements
+
+[#1472](https://github.com/cylc/cylc-ui/pull/1472) -
+Added GScan refresh button
+
 -------------------------------------------------------------------------------
 ## __cylc-ui-2.1.0 (<span actions:bind='release-date'>Released 2023-09-07</span>)__
 
diff --git a/src/components/cylc/gscan/GScan.vue b/src/components/cylc/gscan/GScan.vue
index a800f699d..5ecc78c1c 100644
--- a/src/components/cylc/gscan/GScan.vue
+++ b/src/components/cylc/gscan/GScan.vue
@@ -26,8 +26,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
       type="list-item-three-line"
       class=" d-flex flex-column h-100"
     > -->
-      <!-- filters -->
       <div class="d-flex flex-row mx-4 mb-2 flex-grow-0">
+        <!-- filters -->
         <v-text-field
           v-model="searchWorkflows"
           clearable
@@ -79,6 +79,18 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
             </v-list>
           </v-card>
         </v-menu>
+        <!-- scan -->
+        <v-btn
+          icon
+          id="c-gscan-scan-tooltip-btn"
+          variant="text"
+          size="small"
+          data-cy="gscan-scan-btn"
+          @click="scanFilesystem()"
+        >
+          <v-icon size="x-large">{{ $options.icons.mdiFolderRefresh }}</v-icon>
+          <v-tooltip text="Refresh workflows list" />
+        </v-btn>
       </div>
       <!-- data -->
       <v-progress-linear
@@ -174,7 +186,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 </template>
 
 <script>
-import { mdiFilter } from '@mdi/js'
+import { mdiFilter, mdiFolderRefresh } from '@mdi/js'
 import TaskState, { TaskStateUserOrder } from '@/model/TaskState.model'
 import { WorkflowState } from '@/model/WorkflowState.model'
 import Job from '@/components/cylc/Job.vue'
@@ -182,6 +194,7 @@ import Tree from '@/components/cylc/tree/Tree.vue'
 import WorkflowIcon from '@/components/cylc/gscan/WorkflowIcon.vue'
 import { filterHierarchically } from '@/components/cylc/gscan/filters'
 import { sortedWorkflowTree } from '@/components/cylc/gscan/sort.js'
+import { mutate } from '@/utils/aotf'
 
 export default {
   name: 'GScan',
@@ -293,6 +306,11 @@ export default {
     }
   },
   methods: {
+
+    scanFilesystem () {
+      mutate({ name: 'scan', args: [] }, {}, this.$workflowService.apolloClient)
+    },
+
     filterWorkflows () {
       this.filteredWorkflows = filterHierarchically(
         this.workflows,
@@ -378,7 +396,8 @@ export default {
 
   // Misc options
   icons: {
-    mdiFilter
+    mdiFilter,
+    mdiFolderRefresh
   },
   /**
    * Lists of all the possible workflow and task states
diff --git a/src/utils/aotf.js b/src/utils/aotf.js
index d4b960b7f..f8ac1daec 100644
--- a/src/utils/aotf.js
+++ b/src/utils/aotf.js
@@ -758,6 +758,17 @@ export function argumentSignature (arg) {
  * @returns {string} A mutation string for a client to send to the server.
  */
 export function constructMutation (mutation) {
+  // the scan mutation has no arguments
+  if (!mutation.args.length) {
+    return dedent`
+      mutation ${mutation.name} {
+        ${mutation.name} {
+          result
+        }
+      }
+    `.trim()
+  }
+
   const argNames = []
   const argTypes = []
   for (const arg of mutation.args) {
diff --git a/tests/unit/utils/aotf.spec.js b/tests/unit/utils/aotf.spec.js
index 2bb479fd6..8fb2b02c2 100644
--- a/tests/unit/utils/aotf.spec.js
+++ b/tests/unit/utils/aotf.spec.js
@@ -603,6 +603,19 @@ describe('aotf (Api On The Fly)', () => {
         }
       `.trim())
     })
+    it('handles mutation objects with no arguments', () => {
+      const mutation = {
+        name: 'MyMutation',
+        args: []
+      }
+      expect(aotf.constructMutation(mutation)).to.equal(dedent`
+        mutation MyMutation {
+          MyMutation {
+            result
+          }
+        }
+      `.trim())
+    })
   })
 
   describe('getMutationArgsFromTokens', () => {