"damn good chance of losing me a lot of income during my retirement"
Are you sure ? One thing I'm struggling to understand is the apparent contradiction between NATS as the nasty face of capitalism continuously exploiting its staff and the belief that the same organisation will agree to pay rises well above RPI in the future. How much you think you will lose in retirement depends on what figure you put in the modeller. The more optimistic you are the more you think you will lose. I don't have a crystal ball but I can't see how any organisation subject to an RPI-x income regime could pay much above RPI however much it might want to unless traffic growth was far higher than anybody realistically thinks. If you put realistic figures in the modeller you lose far less and are still much better off than anybody on the new defined contribution scheme.
For those of us who may be made redundant before our 40 years the current modeller is actually only half the story. What is also needed is a modeller which says how our pension is affected if we don't contribute for as many years. That has a huge effect on what we might get paid on retirement and against that the losses caused by the RPI + 0.5 limit will look very modest.