You scared me there for a minute. The DT Tower of London also still has a lounge according to their website (and IMNSHO is far superior both in terms of lounge and hotel to the DT Riverside. In fact I would say their lounge is superior to a number of the Hilton lounges from the last time I stayed there. Of course, that was a couple of years ago.)
You are right and it’s certainly superior in every way to the DT riverside, I was upgraded to a huge suite overlooking the tower last stay, great hotel!