Charlie Luxton goes behind the scenes exploring the enormous £45 million art project set to illuminate central London's bridges with more than 100,000 lights.
As work on the bridge starts, an Egyptian goose lays an egg putting the schedule in a spin. Charlie Luxton goes dangling off the side of London Bridge.
After three years of planning the big day arrives as 69,000 lights illuminate four of London's iconic bridges in the world's longest piece of public art.
