6m tropo?

G8EPQ (77km) and I continue to exchange 6m WSPR spots today. Although there is evidence of aircraft reflection, this is probably mainly tropo at this range.   About 1Hz of the drift is due to my rig. When there is a large drift I suspect this is aircraft Doppler shift, so the dominant signal then (that being decoded) is via aircraft. So, probably tropo, but also via planes.

G4BRK (134km) was spotted on 6m WSPR yesterday but not seen him yet today.