Cornflake - I think you make some good points. In the past NAPS changed from 56ths to 52nds - ie and improvement when things looked good. There is no reason why it shouldn't in the future if things are similarly good. However, the guys who did that last time, may be re thinking it now, making it less likely. If we don't get a reversible fix, there is nothing we can do about it. If we do get a reversible fix, we do at least have some leverage.
Another key point is that most of the groundstaff have a relatively flat pay structure. Ours is on a steeper gradient, so if we were to get (for instance) a career averaged scheme, it would affect us more. In other words, we have more to lose than the groundstaff, who may not strike in the same vein as those you mentioned above. We could well be screwed.