Everyone thought Traitors wouldn't be as good with celebrities, but it's almost better. Because there isn't that extra thing about people who really need the money, trying to win the money. The money is going to charity, so it's kind of more cutthroat, but almost more of a straightforward game. You're not feeling sorry for someone who needs some money. It's going to a good cause, so all the gloves are off. The characters are brilliant.

I don't have a favourite. I really like Nick Mohammed, but I feel he played a bit of a blunder by trying to fix one of the games and then admitting it to everybody. But he is on to the traitors. I think Jonathan Ross played blinder. But to the viewer it was really obvious he was a traitor. Loads of people have said it, and then they've just let it go. They've just gone down some other blind alley. So that's been quite frustrating, but hugely entertaining.

I don't know who is going to win. Joe is pretty good, but he's fearsome. He just does this death stare at them. Joe is kind of silent but deadly, they will probably vote him out because of that. They'll probably vote Nick out because of that. Celia is brilliant, in fact they are all brilliant. It's very hard to single one out.

Part of the fun is everyone has a theory, but you can't have a theory. Because if somebody's sort of overacting like Mark Bonnar, all of that stuff, really kind of performative, as people would say, but he's a faithful, and he said, I'm a faithful, I always wanted to be a faithful. Nobody believed he would want to be a faithful. Obviously Alan Carr, what can you say? Because we know he's a traitor, it's obvious to us. Why is it obvious to us and not obvious to them?

When he was walking out, Mark Bonnar noticed Alan looking down, looking really intense and serious, but he never mentioned it again. It's all those little things. 

Celebrity Traitors is on BBC One on Wednesdays and Thursday at 9pm.