'Tom Daley can't be a traitor, he'd just laugh!'

Tom Daley has said: "I want to win"

Olympic diver Tom Daley is plunging into a new challenge as a contestant on the BBC's The Celebrity Traitors, but his close friend, fellow diver Tonia Couch is not convinced he is cut out to be a traitor.

"I just don't think he's got it in him to be a traitor," Couch told BBC Radio Devon. "I think he would just laugh! He would crumble under pressure. If he's a traitor, I will be shocked."

In the game show, contestants - known as traitors - pick off their castmates, the faithful, with nightly "murders", while the faithful try to work out their identity. If any traitors remain at the end, they win the cash prize for a charity of their choosing.

Daley has said: "I want to win."

The cast includes Stephen Fry, Jonathan Ross and Clare Balding

Couch believes Plymouth-born Daley's competitive nature will shine through in the physical challenges though: "He'll be smashing that, he will definitely want to win, but I think he will also help the guys."

The programme begins on Wednesday.

Daley agrees he is in it to win: "Very competitive. Oh, I want to win. That's the whole point of the game. I'm there to have fun, but at the same time I want to do well."

A longtime fan of the show, Daley said: "I've watched the show forever… We play the game at games nights, so I cannot wait to be fully immersed."

On whether he'd prefer to be a traitor or a faithful, Daley said: "I feel like being a traitor gives you the full experience… but I think I could do both roles quite well."

With a cast including Stephen Fry, Jonathan Ross and Clare Balding, the season promises high drama.

Former contestant, the Reverend Lisa Coupland from Cornwall, predicts actor Nick Mohammed could be one to watch.

"I think he's got the ability to play that role very, very well and get away with it… slightly go under the radar," she told BBC Radio Cornwall.

The Celebrity Traitors is coming to BBC One and iPlayer from 21:00 BST.