It was a pair of Dutch F-16s that mistook Kenley for Biggin three or four years ago. Mind you, they might not have been the only ones!
And Duxford - an American Airlines MD-11 beat up some place south of Duxford a few years ago (no, it wasn't Stansted!) and a Lakenheath F-111 I think showed Cambridge a thing or two by mistake... realised after the first pass and repositioned a few miles southwest...