This might be useful for some:
AIR 20/7260 AERODROMES (Code 3): Consolidated statements on the use of RAF airfields: February-April
I stumbled upon it at the P.R.O. some years ago looking for something else but couldn't remember the document number until now.
Basically it's post war list of all the aerodromes and land purchased for flying by the Air Ministry and the decisions on what to keep and what to dispose of. While it might not sound much there is a lot of information of lesser and "unknown" aerodromes. For example the early war ELG/Scatterfields are often listed as small pieces of land bought up for fighters to fall back to should the Germans invade. Some became RLGs or proper aerodromes, others just sat unused as pasture until the end of the war when the A.M. returned/disposed of the land.
Sadly it doesn't list positions of the land and often just gives a year for the date of aquisition/contstruction but often it gives the exact date of decomission, if why an aerodrome was not proceeded with and the acreage aquired which can sometimes help when figuring which fields made up the site.
It helped me find three "unknown" Gloucestershire landing sites and some period A.M alternate names for places which then helped me find further documents.