The Holmes on Baker Street. Lovely staff, great location. Just a really nice stay. Believe it's 70k now. If it was still 50k I'd be staying there next week. Rather, I'm booked at Park Plaza Waterloo which is nice if a bit soulless. Also at the 50k level is the Park Plaza London Riverbank near Vauxhall. Modern property, but some of the most cluelesss staff I've encountered at a London hotel.