There were an astonishing number of airfields in the UK during WW2 with a particular concentration in Norfolk, Suffolk and Lincolnshire.
A few survive to this day as operational airfields and fragments of others exist as private strips but most eventually returned to agriculture, hangars being especially useful as grain stores.
Grafton Underwood as it is today...
...and as it was in WW2:
Unusually, belts of trees now stand on the alignment of the wartime concrete runways and the star pattern rides still exist in the woodland to the east.
Note the memorial site on what would have been the first hundred yards or so of the runway.
Memorial Site Street View
Link