It's not like that. Years ago there were allotments owned by Norwich City Council next to the airport. A handful of people had sheds there and grew veg and socialised. However after years of protest the site was sold and is now a hotel/McDonalds etc.
... and the allotments were relocated over the road into a fertile field. The new site has it's own car park and each allotment holder was given a free, permanent garden shed, allotments a third larger than previous ones and a free water supply. All paid for by the developer of course.
Perhaps someone could convince any prospective developer at Sandown that an "Airpark Community" (with their own allotments) would be an attractive investment.