‘I’m having so much fun!’ Lenny Rush on fame, Father Christmas and why Essex needs to watch out

In his joyous new comedy Finding Father Christmas, the star is on a mission to prove Santa really exists – and he’s got Stephen Fry to help him! He talks magic, trampoline mayhem and finally getting behind the wheel of a car

It’s time for a father to have an awkward conversation with his teenage son. No, not that one. This is far worse – Chris is 16 and still believes in Father Christmas. He needs to know the truth: all the presents, the fake snow on the roof, the soot in the grate, it was all his dad. “You’re Father Christmas?” says Chris, astonished. “You bring joy and happiness to billions of children all over the world?”

In Finding Father Christmas, Channel 4’s funny and moving comedy, Chris, played by Lenny Rush, bunks off school and sets out on a mission with his older cousin Holly (Ele McKenzie) to prove to his sceptic dad that Santa is real. Poring over a photograph taken at a celebrity party, Chris thinks he has identified four people who may have secret links to Santa – Stephen Fry, mathematician Prof Hannah Fry, the space scientist Maggie Aderin-Pocock and SAS: Who Dares Wins star Jason Fox. Finally, he follows clues to a secret secure facility in Milton Keynes and breaks in with the help of a mini trampoline and the magic of television (a bungee cord). “It was terrifying, but so much fun,” says Rush of the stunt. “I feel like if I was offered [to do it] and I said no, I’d kick myself on the way home. I wanted to give it a go and I’m happy I did. But there was an element of fear.”