Famous throughout the UK for his chatshow, my favourite memory of him however, is Ghostwatch - a ‘found footage’ style horror mockumentary which predated movies like The Blair Witch Project, REC and Paranormal Activity. Him being cast in it was a stroke of genius. It ended up being very controversial as it was played absolutely straight by him and the rest of the cast.
If you’ve never seen it, it’s on the Internet Archive for free.
Slightly OT, but since you brought it up, I know the guy who was behind Ghostwatch. Interesting person. He also does a lot of radio drama.