If this guy is in his 50s then by leaving it this late in withdrawing his TWR/APP position, the nats management may be "encouraging" him to leave nats voluntarily and opt for retirement and in that way nats dont have to pay removal expenses etc. Cruel and mercenary it certainly is, but thats the way nats management are nowadays. It is also one less of the CAAPS members to deal with when they decide that it is time to change the terms and conditions attached to the pension fund.