What makes you think the regulators would be forced to step in? - BA is a private company and any industrial dispute is between the company and its staff - what the regulators think doesn't come into it.
As Slamitin suggests, the Pensions Regulator has EVERY interest, and indeed has strong and sweeping powers if the matter is not resolved! Legislation has changed, it seems you're not up to date with it.........
Like Slamitin, my companies scheme has also undergone large changes over the last few years. Could retire at 55 without penalty, now retire at 60 or loose 6%/yr. Pilot contributions gone up by 50% etc. BALPA's pensions guy attended the pilot meetings to discuss the changes, and we were told it's everyones problem, not just the companies. We were told to be realistic, and accept the changed conditions upon the table. Now it's going to happen to poor old BA employees you all seem to think it's unfair! I trust BALPA supports you in the same way it supported us - with the same advice!
Welcome to the real world..........