Parliament Hill Fields' Art Deco Lido is one of my favourite places to go to swim, sunbathe and picnic. On a recent visit, after taking a dip in the freezing cold water that looks so sparkly and inviting, I noticed Ruth Corney's fantastic photos of the many characters that visit the pool. The Lido is excellent for brazenly people watching and Corney's shots capture not only the many individuals of all ages that come but also the strange behavioural instinct that comes over Londoners when entering the Grade II listed arena - friendliness.