diff --git a/releasenotes/notes/feature-flags-9faf32a3d49af4fc.yaml b/releasenotes/notes/feature-flags-9faf32a3d49af4fc.yaml
new file mode 100644
index 00000000..cda81f7e
--- /dev/null
+++ b/releasenotes/notes/feature-flags-9faf32a3d49af4fc.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Support is added to enable all stable RabbitMQ feature flags by default.
+    This happens automatically post upgrade, and avoids compatibility issues
+    which could occur when installing a new version of RabbitMQ.
diff --git a/tasks/main.yml b/tasks/main.yml
index d886800b..eae18ec2 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -81,3 +81,7 @@
 
 - name: Flush handlers
   meta: flush_handlers
+
+- name: Importing rabbitmq_feature_flags tasks
+  import_tasks: rabbitmq_feature_flags.yml
+  when: _rabbitmq_is_last_play_host
diff --git a/tasks/rabbitmq_feature_flags.yml b/tasks/rabbitmq_feature_flags.yml
new file mode 100644
index 00000000..33b047a0
--- /dev/null
+++ b/tasks/rabbitmq_feature_flags.yml
@@ -0,0 +1,45 @@
+---
+# Copyright 2024, BBC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+- name: "Gather cluster status"
+  command: "rabbitmqctl cluster_status --formatter json"
+  register: _cluster_status
+  changed_when: False
+  tags:
+    - rabbitmq-upgrade
+
+- name: "Only enable feature flags if all cluster members are up and stable"
+  block:
+    - name: "Check for disabled RabbitMQ feature flags"
+      shell: "rabbitmqctl list_feature_flags | grep disabled"
+      args:
+        executable: /bin/bash
+      register: _feature_flags
+      changed_when: False
+      failed_when: False
+
+    # NOTE: changed_when required despite the above check because 'unstable'
+    # feature flags will remain disabled each time this runs
+    - name: "Enable all RabbitMQ feature flags"
+      command: "rabbitmqctl enable_feature_flag all"
+      changed_when: False
+      when:
+        - (_feature_flags.stdout_lines | length) > 0
+  when:
+    - ((_cluster_status.stdout | from_json)['running_nodes'] | length) == (groups[rabbitmq_host_group] | length)
+    - ((_cluster_status.stdout | from_json)['alarms'] | length) == 0
+    - ((_cluster_status.stdout | from_json)['partitions'] | length) == 0
+  tags:
+    - rabbitmq-upgrade
diff --git a/vars/main.yml b/vars/main.yml
new file mode 100644
index 00000000..4adb9ce3
--- /dev/null
+++ b/vars/main.yml
@@ -0,0 +1,19 @@
+---
+# Copyright 2024, BBC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+_rabbitmq_is_last_play_host: >-
+  {{
+    (inventory_hostname == (groups[rabbitmq_host_group] | intersect(ansible_play_hosts)) | last) | bool
+  }}