Random comment, while I'm thinking about it. When I went swimming on Sunday, they had a sign up saying that they're running "family afternoons" in March. Basically, this means that from 1-3pm (I think) on a Sunday, they will only have 1 lane (1/3 of the pool) for swimming lengths, and the remaining 2/3 will just be open for general stuff. I assume that this isn't just for families, so if anyone likes the idea of general splashing around without just swimming lengths, then this may appeal. There's no info on their website yet, but they may update it later (or you can drop in, if you're an Imperial student).