FB 851 then BA 1306 at Heathrow
Sofia → London → Aberdeen
Timetable, London time
12:10FB 851 from Sofia at the gate
11:25BA 1306 to Aberdeen leaves the gate
23 h 15 apart on the timetable, overnight
BA 1306 leaves 23 h 15 after FB 851 arrives on the timetable: more than half a day, so not a connection we count.