diff --git a/.mailmap b/.mailmap
index e317b6279..e20e9107c 100644
--- a/.mailmap
+++ b/.mailmap
@@ -25,3 +25,5 @@ Jamie Allen           <jamie.allen@metoffice.gov.uk>           JAllen42
 Jamie Allen           <69790602+JAllen42@users.noreply.github.com>
 Christopher Bennett   <christopher.bennett@metoffice.gov.uk>   ChrisPaulBennett
 Mark Dawson           <mark.dawson@metoffice.gov.uk>       Mark Dawson         <mark.dawson@metoffice.gov.ukpython>
+Harleen Kaur          <harleen9355@gmail.com>                  harleenkaur2003         <160705023+harleenkaur2003@users.noreply.github.com>
+
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 69c8e59e5..bf3c1fe3d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -61,6 +61,7 @@ below.
  - Christopher Bennett
  - Mark Dawson
  - Min RK
+ - Harleen Kaur
 <!-- end-shortlog -->
 
 (All contributors are identifiable with email addresses in the git version
diff --git a/src/components/cylc/tree/TreeItem.vue b/src/components/cylc/tree/TreeItem.vue
index aef856dfa..ed35f2945 100644
--- a/src/components/cylc/tree/TreeItem.vue
+++ b/src/components/cylc/tree/TreeItem.vue
@@ -91,6 +91,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
               />
             </div>
             <span class="mx-1">{{ node.name }}</span>
+            <span
+              v-if="!isExpanded && latestJob(node)?.platform"
+              class="mx-1 text-grey"
+            >
+              {{ latestJob(node)?.platform }}
+            </span>
             <FlowNumsChip :flowNums="node.node.flowNums"/>
           </div>
           <template v-else-if="node.type === 'job'">