Well it is a fact that a CAP509 course in 1992 cost almost exactly the same as an Integrated course in 2002.
So in one way the cost of training has not increased. The industry is bigger now than a decade ago when - alone - Ryanair (46 Boeings) and easyJet (64 Boeings) didn't even exist.
If you are unaware of the pilot hiring market of the early nineties then rest assured, it was just as dire and possibly worse than now.
Not that its much comfort of course.
BA may or may not re-open their cadet scheme next year. They probably don't know themselves. So I would suggest working on the assumption that they don't and make your plans accordingly.
Good luck,
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