The recruits go head-to-head in a terrifying hang-tough task 160 feet above a quarry - testing mental and physical strength. Then they take on a car ambush task where they must drive into a simulated war zone, pick up an ally, and vacate hostile territory into a safe zone, intact.

Rebecca Loos, Louie Spence and Conor Benn are among the 14 celebrities taking on the most challenging selection course in the world. This series comes from Wales, the birthplace of the Special Forces. For their first task, the celebs must plunge into the freezing sea, swim to a rendezvous point and attempt to jump onto a moving speedboat.