British government phones follow strict security standards that include backup requirements, but they aren't backed up like a standard consumer phone.

​Managed Backups: Devices are typically managed via Mobile Device Management (MDM) software. This ensures that business-critical data (emails, documents, and contacts) is synced to secure government servers rather than personal cloud accounts like iCloud or Google Drive

Morgan McSweeny's phone being stolen is irrelevant as the data is all there!