HMS Triumph returns to Devonport for decommissioning after 34 years of service

HMS Triumph, the last of the seven Trafalgar-class submarines to serve in the Royal Navy, has sailed into Devonport Naval Base in Plymouth for the final time.
The boat will be decommissioned in the coming weeks after over 30 years of service.
Refer:   https://tinyurl.com/4bdpe624