Not many people realise just how long there has been an airfield at Luton.
About 10 years ago, not long before I retired, they were digging up part of the apron to rectify some cracking and subsidence. About 15 inches down they hit Roman mosaic. Work had to stop, and the archeologists were called in.
It turned out that almost exactly below the modern stand four there was a T shape of yellow tesserae, together with an IV and, to the left of the head of the T the word STOP in Latin. ( Can't remember the exact Latin )
Makes sense for them to have put an airfield there. Handy for Verulamium ( now St Albans ), Durocobrivis ( Dunstable ), easy access from Watling Street, and from the older Icknield Way.
Also, of course being on top of a hill, easy to defend when the tribes got a bit stroppy.