BA 893 then SK 812 at Heathrow
Sofia → London → Oslo
Timetable, London time
21:50BA 893 from Sofia at the gate
19:50SK 812 to Oslo leaves the gate
22 h apart on the timetable, overnight
SK 812 leaves 22 h after BA 893 arrives on the timetable: more than half a day, so not a connection we count.