Cusco,
I reckon we use the same CFI,I was doing my bi-ennial ( in a Stearman,to narrow it down) with an ex Harrier pilot and we had a close encounter with a very fast low flying military over the Norfolk Broads.
The CFI said,"Where's the other one?"
We never saw it.
Incidentally this CFI taught me to fly at OB.
Lister