It’s not always easy to identify jets by their sound, but I can generally be fairly certain when an F-15 Eagle is around, they’re a deeper, more rumbling sort of sound, and last Friday I could hear one overhead, but it seemed to be circling, so I checked ADS-B to see what it was up to:
it seemed to be drawing pretty patterns, so I kept an eye on it. By the time it upped sticks and left for home at Lakenheath, it had created a veritable cats-cradle over part of Salisbury Plain, which leads me to believe it was working with army in some manner.