That's a ball park wild arsed guess based on the difference between the maximum amount that NATS said at the briefing it could pay, roughly 30%, and the funding figure without the propsal which it says it can't afford which was 42% at the briefing I went to.
Is that true? I've never heard NATS state they could afford to pay 30%.
Remind me again what their contribution rate will be if and when the proposed changes happen?