Cornish adaptive surfer Pegleg plans to extend his VW campervan by creating a new cabin from scratch, while Martin and Carol-Anne want to build a glamping pod in their Pembrokeshire garden, using a dome that originally housed an electricity generator... (more) at the London Olympics. George also visits an earthquake-resistant glass house on the coast of western Japan, and looks at aluminium panels as a new kind of canopy for his treehouse.