Hi Vicb, I have tried pretty much all London hotels, I like to go to differant one each time From your choice, I would say Hilton Tower Bridge. Park Lane is over expensive with small rooms and not actually that convient, over rated and not that good a 5*. Tower Bridge, nice modern, close to Transport and sites. Great exec lounge with nice outside Terrrace. Close to London Bridge station for mainline trains. Double Tree Tower of London, but further out of way, again great hotel, showers in exec rooms not bath, free mini bar as no lounge and welcome drink. Nice bar on rooftop with great views. Breakfast is good but Hilton Breakfast better. Both had nice gyms 24 hours always quiet. Staff at both really nice, but Tower just edges it when comes to staff.