Those amounts are locked in for the next 2 years. 2010 and 2011. Things may change if nobody is leaving by the end of next year. The problem is now too many pilots!
There seems to be a big delay with the new spec scheme. Maybe they now realise they don't need to use this at the moment because there are plenty of pilots to fill the liabilities.
I don't know how they will decide on who becomes spec aircrew, because there will be an oversupply of qualified members wanting to continue flying on a better pay scale.