I hate leaked lineups because when people see how piss poor it is they don't tune in. Keep it all secret, so people watch and then even in the event of a weak lineup they still might continue watching if they're entertained by the cast from that night.

I don’t think The Sun should be allowed to leak it. Can’t they have stopped them by embargo it or something?

No, I think they get their 'confirmed' names from the agents, Celeb themselves, and spotting them on flights/near elstree so unless Channel 5 tell news outlets they've signed up then they can't embargo.

I'd imagine this mystery man has been embargoed