George Clarke's Amazing Spaces: Rare Caravan and a Dog House Conversion

Farmers Ali and Rich reveal how they hope to salvage one of the rarest caravans in the world, complete with a spiral staircase and roof garden, and Devon fireman Nick plans to transform an old doghouse into a studio garden apartment for his mother-in-law. The presenter visits a fold-out beach hut in New Zealand, and an electric wheelchair provides the engineering breakthrough George and Will need to rotate their futuristic home