I had an agent who charged 16% including VAT. He is a member of the British Association. I caught him out when he asked us to do a £120 booking on a Tuesday night, Our usual fee was £200 but he pleaded that it was Tuesday and a girl's birthday party so we agreed. We did the booking for £120 and he charged his usual 16% but when he took the booking he also charged the birthday girl £80 deposit so in the end he got £80 plus 16% of £120. I wouldn't trust another agent as long as he has a hole in his arse.
Bill