Two of us were standing by the River Ouse in Ely, Cambridgeshire, underneath the approach to Mildenhall. We discussed it at length, as being an unusual sight and considered it's application to the recently arrived F35's at Lakenheath.
Earlier 4 KC135's came over followed by a Hercules transporter.
I believe we saw something unique today.
I dived into Flightradar24 but saw nothing there.