BACrewboy makes a lot of very valid points. No one would want to accept their employer arbitrarily going to town on their Ts&Cs, ones that you may have only just signed up for not long ago. I think you should be aware that as it stands, Bill F seems to be offering a lot of protections to your present deal, and, to be honest, it's not people like you he is after reforming.
A.Lurker.
Your comparisons between the various airlines left me thinking that you had left out an important one.
BA LHR vs BA LGW. - Almost identical product, planes, service, etc etc, but very different rostering, pay, agreements etc etc. A harder one to explain away.