[Keith]

I suspect some of the existing ones could, were they allowed to.

I’m not saying entirely unscripted of course, it was never that.

I'm surprised really Michael McIntyre isn't more involved in Red Nose Day. I reckon he'd be one that could handle going off script as seen recently on the Big Show when technology failed during the Send To All section. He still managed to laugh it off and keep the audience entertained whilst it was being sorted, and that whole section could have been edited out, but it was kept in.

I imagine that like many comedians Friday nights most weeks are pre-booked with gigs, same as Saturday nights. I seem to recall Jimmy Carr citing it as the reason why he's recorded many of his TV programmes in the past on a Thursdays.