Most likely lapsed yes. A 3 year deal would be good, but it depends on the content as I said above. If it is for a meagre amount of something like 2% then we have undernegotiated considering we are emerging from a recession and going into good times.
The other thing about having it backdated (and yes, we should have it backdated) is that many F/Os at the bottom end of the scale will lose out tax wise should they get a lump sum. Doesn't matter to captains as they already pay 40%.