Tides are strange and magical things. For a start, why are there two a day; and why do tidal ranges vary so much from place to place? In London the magic creates a beach in the heart of the City by the South Bank.
A musician takes sets up a keyboard and bystanders throw down coins, a modern variation on the old mud lark tradition; and families collect shells and write in the sand. It lack only deckchairs and Punch and Judy. Photos South Bank, London, 2nd July 2016