Documentary that goes behind the scenes at the British Museum. The museum wants to bring some of China's Terracotta Army to London, but will they get the warriors they want, and how much will it all cost? The museum is also facing the challenge of shifting 30 tonnes of enormous, fragile and irreplaceable works of art from London to Shanghai. This episode follows the 'heavy mob' as they try to ensure that ancient Assyrian reliefs reach the other side of the world intact.