HMS Bristol is a Type 82 Destroyer. Built to escort a class of Aircraft carriers that never materialized.
She is permanently moored on the quay at HMS Excellent (a shore establishment on Whale Island, Portsmouth and home of Naval HQ).
The Royal Navy use her as a training ship but for our purposes she is basically just accommodation.
If you've got a visit or course going on in Portsmouth you can book space onboard.
They offer mess deck accommodation for the cadets - bunk rooms with 3 bunks to a tier; and cabins for the staff. Or if it's very full on board, SNCO Staff also get Senior Rates mess decks.
There is a small senior rates mess bar and Wardroom for the officers.
Meals can be taken in the mess ashore.
There are a whole load of training classrooms and cinema aboard and I dare say one may be able to book these too.