The seven deadly fins

Dougie Poynter have signed up for a stomach-churning sequence of dives, where they will encounter various species of shark, getting gradually more perilous each time.

- BY EMMA BULLIMORE

Although Countdown’s Rachel Riley is excited for the challenge, most of the celebs look like they want to fire their agents, with Call The Midwife star Helen George declaring she’s terrified of the sea, and Motherland actor Lucy Punch hilariously dismissing the apex predators as “savage tubes of teeth”.