FB 851 then BA 950 at Heathrow
Sofia → London → Munich
Timetable, London time
16:55FB 851 from Sofia at the gate
12:45BA 950 to Munich leaves the gate
19 h 50 apart on the timetable, overnight
BA 950 leaves 19 h 50 after FB 851 arrives on the timetable: more than half a day, so not a connection we count.