George returns for a Christmas special, visiting Christmas-themed builds including a gingerbread house, an underground grotto decorated with over four and a half million shells, and a beach hut advent calendar where every day a festive space opens its doors to the public. George also catches up with expert designer William, to look back on the extraordinary journey to transform his 1970s caravan into a spectacular 21st century holiday retreat.

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.

George visits a flat-pack tin church. There's also a luxury converted chapel, ice carving in a Liverpool wonderland and a catch-up with some of George's best builds of the year.

In this special episode George Clarke joins forces with up-cycling expert Max McMurdo to learn all there is to know about building a floating home, from Docklands to Denmark.

George looks back over some favourite projects from across five series, with some amazing tree houses from Scotland to Sweden and Tuscany to Northumberland,