It's made up - the first series was a bit more convincing (not convincing enough but watchable). Having seen Derek Acorah fumble his way through a live performance (sister bought tickets), I can safely say he didn't have many sane people convinced at all, in fact he got a right battering in the Q&A at the end, which was hilarious. Interestingly, I didn't think it was physically possible to be any more outspan-tanned and bleached than he is on telly, and he's even more neon in the flesh.
After speaking to insiders, I can safely say that MH is a load of cack, Derek has a research team and Carl threw the spoon.