This is a celebrity comic whose name cannot be publicised. It may be a huge star or, more likely, a familiar TV name who is road-testing new material ahead of a tour.

Their name is usually withheld for fear of fans going to the club, rather than buying tickets for the tour, although promoters will often reveal the identity if you ring up.

But be warned, TV commitments may mean they have to pull out at short notice, so treat any mystery guest as a nice surprise, rather than going out of your way in the hope of seeing a megastar.