How aboput this - We (NATS) starts being more frugal with the money from profit that it re-invests into the company. Then we dont waste millions on projects that are doomed to fail (due to short sightedness or ridiculously short timescales) such as TC North, Central, AMAN, iFacts etc.
Money spent on airspace design and capacity improvements can't just be shifted across to pay for the pension though. It is specifically set aside for such projects as part of what NATS put forward to the regulator for costs. I don't think the airlines would be too happy with NATS saying thanks for the cash boys but s*d your capacity gains because we're using it to shore up the pension.