Hi mate you have to go through as general plumber not gas fitter but when you get to the collage the ask are you roof plumbing or gas fitter,tick one or other there is a paper test regarding the gas fitter one 40 questions I think as for the practical test its so easy I did it with my eyes closed I'm like you mate for the last twelve years all I have done is install central heating systems.its a very basic test don't worry about it just do it good luck. Pm me if you need more info on the practical test
