Although it wouldn’t be my choice for a RAF strategic bomber... (personally I think that with the SSBNs there are no real need for them), but if budget wasn’t a problem, as the main opponent (& target) is much closer, I think range is not so critical as a fast response, so I would go for something like a Anglo-French mini-Tu-22M, which also could be used in maritime strike role... I made several sketches of it, but I really doubt that I will have sufficient will to someday “shipbucketing” them.
But on the other hand a RB211s re-engined B-52 was contemplated very seriously by USAF, so here's the RAF version... Basically a B-52H with 4x RR211-535E4s instead of its 8x TF-33s (using the refit, aft Vulcan was removed), and a refueling probe to be compatible with RAF tankers, I know the position of the probe is a bit unorthodox, but it´s the best place I could find, as the cockpit roof and the radome are already occupied with other stuff... Paint scheme is RAF Hemp overall with Anti-Flash White undersides.
As always, any comment, advice or corrections are welcome!