As others have said, it is unlikely that airfields can be reclassified as green belt land. What we should be petitioning for is what John Prescott promised 20 years ago - that airfields should be excluded from the automatic assumption that, as brownfield site, they are first in the queue for development.
Prescott ratted on that and since then, no minister has thought of correcting the 'drafting error'. Strange that..
That said I've signed