Can I fly my drone a 1/4 of a mile close to the end of the radius of an airport?
As long as you *DO NOT* cross into the airports restricted zone you should be ok as far as the authorities are concerned. However, being that close to so many airports don't be surprised if members of the public approach you and question your legality. Always better to be safe than incarcerated. Google "Gatwick"
Try it and see what happens. *rolls eyes*