The new Dreadnought class at over 17000 tons will be the largest ever RN submarines.
01 HMS Dreadnought
02 HMS Valiant
03 HMS Warspite
Number 4 is announced today 3 May 2019 as HMS King George VI..
In model form you may be interested in the Mountford new submarine releases in april 2019 which will mean that all the nuclear powered RN subs are in the range at a constant scale of 1250. This new design will be produced by Mountford when there is enough reliable information in the public domain.
Mountford are also producing some more submarines in 2019 including some French, Russian and Israeli and the museum boat HMS Alliance.