The Pro membership is pretty good about £20 a year, you just have to provide proof of your beauty profession.
Makeup artist get 40% discount and beauty therapists, nail technicians etc recieve 30% discount, which is excellent BUT if your going into a Mac store instead of online just check that it is a Mac Professional store not a normal Mac store as you will only get discount in the Professional store! I found this out for myself as the leeds/manchester Mac are normal stores and the nearest Mac Professional to me is in Liverpool!