George travels to Yorkshire, to meet twenty-somethings Jasmine and Rupert, who plan to convert an old German fire truck into a cabin on wheels to take around Europe, satisfying what they call 'a quarter-life crisis'. George also takes a trip to Warrington to meet inspirational businessman Phil, who's spent thousands out of his own pocket transforming an old fly-tipping site into a stunning nature reserve, and now wants to build a community classroom so local schools can enjoy the site. The penultimate leg of George's tour of innovative Spanish architecture takes him to the sun-baked South East, where a cutting edge cantilever house has to be seen to be believed. And it's all hands on deck at the big build, when the team faces the nail-biting challenge of bringing the reconditioned Ford Transit chassis and new expandable living pod together for the very first time. But will it all go according to plan?