All I can say for certain is it is a T boat doing a cold move into 5 basin in Devonport.
Thankyou SolIf WreckerL is saying that it's a T Boat, definitely go with that, he knows his stuff.
Is this one of the Resolution class, so one of Resolution, Repulse, Renown or Revenge?
I'm not sure, someone like Janner or Breathing Out On The Way Up might know. They will probably see this thread in the next 24 hours or so.