George meets a couple planning to transform a tiny 1960s ambulance into a campervan where the family of six can cook, eat and sleep

George visits an apartment inspired by a beehive, a cocktail bar made out of a dilapidated Land Rover and a real life UFO suspended in the trees at a tree hotel in a Swedish forest

George meets a carpenter hoping to turn a double decker bus into a holiday retreat, and a couple who have quit their jobs and thrown their life savings into designing a boat hotel

George meets a woman who wants to build a shop and mobile home out of an old horsebox, but she only has £500 to spend

George is invited onboard a blinged-up double-decker bus that's been converted into a posh restaurant and bar. He meets a couple living in a railway station and sees their plans for the waiting room.

George catches up with designer Max McMurdo, who is making a classroom out of two rusting shipping containers. And there's also a garden office and a beauty emporium run from a rare 1947 caravan.

George prepares to unveil his own small-space project, an ambitious, accessible, multi-functional tree house within the Calvert Trust, an outward bound activities centre for families with disabilities

In this festive special, George visits an incredible man-made stalactite crystal grotto in Surrey and meets a small spaces enthusiast who has rebuilt and renovated a Victorian flatpack tin chapel in Shropshire to create a magical holiday home. George catches up with carpenter Adam, who created a double-decker bus holiday home on the Brighton coastline, with Jay and Jonathan at their ambulance-turned-campervan in Norfolk, and Barry at his hexagonal home in Lancashire. Meanwhile, it's Christmas in the tree house with Rew from the Land Rover cocktail bar helping to get the celebrations started.