Looking for self catering accommodation for 2 adults and 2 kids (8 and 3) in London, 4 nights in 2nd week of July. Don't know London so not sure where to look and accommodation seems really expensive! Anyone got any hints for finding places? We want to be quite central for main attractions, museums etc. Hoping to do this on the cheap but is this just a dream in London?! Don't mind if its basic but just not grotty! thanks.