Flying over Lambley (a few miles North East of Nottingham) at about half two (ish) yesterday afternoon. Pretty high but could have feasibly come from East Mids. Transport plane I’d say, grey colour, high mounted swept wing and tail plane, didn’t look big enough to be a C17 (may have only been a two engine jobbie and at the height it APPEARED to be it looked about the SIZE of a Hercules but I could be very wrong) but it was pretty bright out so had to make do with squinting at it so who knows, it could have been. Research suggests my height/size perception was off and it was a C17. One thing, it sounded a bit weird. Sounded like a cross between a jet and a prop.