No, has never been the case. Line training is based on the availabilty of LTCs. The training department has a list of cadets and a list of training captains. You go where there is a training captain. Probability suggests that this will likely be STN, DUB, HHN etc due to their size. However there are trainers scattered throughout the network. When you complete line training you get a call from a lovely lady at STN who fixes you up with your base. And that's all down to operational requirements (which can change on an hourly basis at FR) It has nothing to do with where you trained and even less to do with where you may want to be based! Base allocation is a bit like the lottery, you pay your money, you take your chances, but the odds are mostly against you. Still, it's all good sport!