The Navigator, Hays Galleria
This scuplture is inside Hays Galleria, itself a rather nice shopping and eating arcade just by the London Dungeon (and a lot of other places you've seen here).
What isn't obvious is that the paddles turn, oars swing and water sprays down like rain. David Kemp is the artist of the piece. He works a lot with found object, and his works seem always to contain humour.