@ Homonculus
They are based mostly on lakes.
So, apart from reservoirs, we have "The Lake District" Nimbyism and the planning difficulties aside, It's a bit of a bloody drag to get there......unless you live in the affluent S.E. England and have your own private airstrip
The difficulty with this country is primarily one of population -density ,which leads to high land values...even pure agricultural land is ridiculously expensive...but as soon as any sort of planning approval is granted, it goes stratospheric.
First you need a co-operative Local Authority*
Then you need the land that nobody else wants ( why's that????)
Then you need enough Aviators with enough cash with enough commitment to want a second (or primary) residence in this god-forsaken spot, purely because it's got a runway outside the door.
I know we English are a *bit* eccentric, but you're really stretching things here.
IF I won the lottery, I'd consider it. As it is, i'd need a stunning bargain to make a small house and a Microlight/Laa type as a viable option.....and i no longer have to work!
* Is there
any Local Authority in the UK that's not so cash-strapped that it's not going to wring wvery last penny of rates-revenue from a development-site? (consider how many breeding-boxes will fit on your proposed airstrip, multiply by,say, £1200 potential rates....do the same with all the other undeveloped land on your Airpark,......now divide
that into the houses you actually build (and they'll pay their own rates as well.
Cheaper to buy a small ,existing airfield as a cooperative and then buy a house for each member from the local NIMBY populace.
I'm quite surprised nobody's done this before......My sister had a bungalow one street back from White Waltham, where her partner had spent time on Military service, (100 yard stroll and jump the fence!

)