Mr Barron has recently publicly stated that, even with the changes, the pension will be difficult to fund
I would suggest the above quote is coded language for your suspicion that the Pension is in extreme difficulties.
If that is the case, which it probably is, I doubt that NATS private side (49%) will survive in the near future.
I don't think the fact that 40% of the staff couldn't be arsed to vote on the pension helped either, and as for those who voted yes, you reap what you sow