I think what you are asking has this answer:-
Serco run another ATC college, it used to be Bailbrook in Bath, but now think it has moved. It is for all other organisations that do not use NATS to train up their controllers. Basically apply for an ATCO job be it for NATS or not, if its NATS go to Bournemouth for 18 months, if its not then go to Serco and do the courses you require. Some non-NATS units pay for some courses, some then expect you to reimburse either part or full costs over a time period of being paid by that unit (ie. you commit to them for a number of years). Alternatively you can pay for yourself to attend the courses, the last time I heard it was in the region of £25,000 per course at NATS Bournemouth.
This is from what I remember and is in no way official, no doubt someone on here will correct me if I'm totally off the ball
