Originally Posted by
Green Flash
A quick perusal of anywhere in North Yorkshire will reveal dozens of disused WW2 airfields, many with very obvious runways still extant. Pick 1/2 doz, a big blob of dayglo (red?) paint on them and you have your ground reference. Yes, you probably can't land in an emergency (well, you probably can) but the Reds display over many non-airfield locations.
Does that include Topcliffe?