Disused
As alluded to above surely the amount of disused or not used ex airfields are more appropriate?
Linton, Dishforth, Topcliffe, Elvington, Stretton, Cottesmore, Wittering etc are all there or thereabouts for a quick set up relatively speaking.
The US have begun reconstructing old based on Pacific Islands recently like Tinian and Midway with the Marine F35s.
Roads don't make sense in the UK unless we're really desperate.