BA 893 then BA 784 at Heathrow
Sofia → London → Stockholm
Timetable, London time
21:50BA 893 from Sofia at the gate
19:55BA 784 to Stockholm leaves the gate
22 h 05 apart on the timetable, overnight
BA 784 leaves 22 h 05 after BA 893 arrives on the timetable: more than half a day, so not a connection we count.