If you're wanting a UK regional base then you're looking at 2 years minimum for BRS/MAN, 4 years for EDI, 5-6 years for BFS/NCL/GLA. London bases quicker.
Usually you'll start at Gatwick. The only option if your preferred base has a long wait is either moving there or going 50%, two weeks on two weeks off. You'll wait a good year before you can get on this pattern.