there is also the the 50m pool (one of the very few in the country!)down at Crystal palace if you are serious about swimming. I used to use it quite a bit. Only thing that used to put me off about that pool was the long and cold walk from the mens changing room to the pool itself. The pool was quite cold also, but you soon get used to it. Anyone been down there lately? - has it improved? The mens showers weren't particularly great a couple of years ago!