Perhaps I should NOTAM Thruxton for low flying lead, direction variable and random
I live at the end of what appears to be "Yak Alley" i.e. just North of Pangbourne and a few years ago on a local balloon flight at around 2,000 feet, an Extra gave an impromptu display looping within about half a mile. We thought it was great. I guess the Chippie display was really appreciated.
It wasn't Mr R. by any chance ?