I think they just dropped a hint on BBC Breakfast.
They were talking about jungles when Mike Bushell said to Charlie "You'll soon be in the jungle" to which he answered "yeah sort of" and then Naga said "woah, don't give away too much"

who is he

here you go.... http://lmgtfy.com/?q=Charlie+Stayt&l=1

If they wanted a random presenter they wouldnt poach one from the bbc

A plonker!

He always seems nice on the breakfast show. It doesn't seem his type of thing going in the jungle. Sounds interesting.