A group of brave celebrities take on TV's scariest challenge show in aid of Stand Up To Cancer.

Over six weeks, the celebs will be coached to conquer their fears as they face a series of physically and mentally demanding training exercises and tasks designed to transform them from total beginners to those capable of scaling the heights. It will be an emotional journey as they must encourage each other and work as a team, while also overcoming their individual anxieties.

At the end of training, the group face the challenge of a lifetime - the most nerve-wracking and vertigo-inducing high wire walk imaginable, as they cross a distance of 1,000ft, 300ft feet above London. All they must remember is the key advice: Don't Look Down!