Bit annoyed to have missed A6-ESH by minutes - at that FL my indoor antenna should easily have picked it from Rugby - hey, ho serves me right for being in the pub...
Didn't turn Radarbox on until 1923, by which time it was in the blind spot of my restricted Polar Diagram...
However, was pleased to log the following:
VQ-BSO ModeS 424954 - a newish Dassualt Falcon 7X of Shell Aircraft.
Picked it up from 1939-1951 overflying the Midlands at 39,250 feet sqwarking 7632 on flight SHE905.