FB 851 then BA 432 at Heathrow
Sofia → London → Amsterdam
Timetable, London time
16:55FB 851 from Sofia at the gate
08:15BA 432 to Amsterdam leaves the gate
15 h 20 apart on the timetable, overnight
BA 432 leaves 15 h 20 after FB 851 arrives on the timetable: more than half a day, so not a connection we count.