The first round of the competition features a battle of the dragons, as a cabin built to resemble a dragon's eye faces off against a dragon's claw.

This time the two pop-up hotel cabins battling it out are a luxury design inspired by a Welsh coal pit and a modernist unit made of slate.

The competition concludes as two cabins fight for a place in the final. This week an ambitious treehouse cabin takes on a tin-clad cabin with a trick up its sleeve.