George Clarke's Amazing Spaces: Campervan, Aquarium and Floating Egg

The architect meets a couple planning to transform a 1960s ambulance into a campervan, and an artist who has commissioned a giant wooden floating egg to use as a work and living space. He also discovers a novel way of turning a suburban basement in Nottingham into an aquarium, and begins his own project to create a fantasy tree house in the grounds of the Kielder National Park in Northumberland