Do you tip a comedian in the UK?
No tip is expected
At a ticketed comedy night in the UK there is no custom of tipping the comedian. The performers are paid for the booking, and the ticket price covers the show, so nobody at the venue will expect cash from you.
Tipping the bar staff is your own choice, in the same way as in any pub or venue.
Ways to support a comedian you enjoyed
Telling people about the night is the most useful thing you can do, and so is buying a ticket for the next one. Following the comedian online and sharing their dates helps them to fill rooms.
Every comedian on Front Row Comedy has a page with their profile and the nights they are playing, so you can find them again.