Calum Best

The celebrities face a series of tasks that will test their resilience to its limits; in searing heat, they must push a one-ton, broken-down Jeep through thick sand in teams led by sibling rivals Curtis and AJ Pritchard.

A dozen famous faces raise money for charity by undergoing a training course in harsh conditions designed to replicate British Army Special Air Service selection.

The recruits compete to survive in three brutal challenges, testing their leadership skills; both teams must construct a zipline and get their equipment across a body of water without it getting wet.

The last seven celebrity recruits must stick to their cover story while subjected to punishing interrogation techniques, including ice baths and being buried in a box to force a confession.

With hand-to-hand combat and split-second decisions about whether to shoot in a simulated war zone, recruits are pushed to their mental limits; Shannon Courtney comes face to face with her anger issues and Ferne McCann confronts her fear of the dark.

A dozen famous faces raise money for charity by undergoing a training course in harsh conditions designed to replicate British Army Special Air Service selection.