Sculptor Antony Gormley of One & Other's summer art project is loads of fun: he asks the people of London to occupy the empty Fourth Plinth in Trafalgar Square, usually reserved for statues of kings and generals. Every hour, 24 hours a day for 100 days, a different person will become their own living sculptures on the Fourth Plinth.
This guy to the left is aquatic scientist Oliver Parsons-Baker, who came up dressed as a giant poo. He's trying to raise awareness and promote better sanitation around the world with Water Aid:
The 26-year-old, who works for Severn Trent Water, has teamed up with Water Aid to raise awareness of the billions of people trapped in the poverty cycle due to a lack of safe water and toilets.
His cumbersome costume meant he had to be hoisted onto the plinth, drawing laughter and applause from the crowd. The outfit was composed of brown foam and leather, with a sizeable housefly dangling from it.
Parsons-Baker got his message across via two placards which bore the message: "2.5bn people don't have a toilet" and "G8 leaders - take action on the sanitation crisis now".