It is a very tough process, first of all starting with initial application, if you pass that then you are invited to sit the standard entrance test, if you pass that you will do an initial fitness screening which consist of a 1.5mile run to be completed in 15min or less ( your would be surprised how many people fail this)
After passing the fitness test you have an initial interview, on passing that you then get a home visit which is another interview albeit more casual. After that you have a panel interview which can be pretty tough going. The final two stages consist of a more thorough fitness test and also a full medical. If you pass everything you will be given a date on which you will commence your training at Tulliallan.
You can fail at each of these individual stages, a fail means another long wait before you can try again, usually 3 months minimum.
Expect the whole process from application to appointment to take well over a year, that’s if you pass everything first time.