BA 419 then SK 804 at Heathrow
Luxembourg → London → Oslo
Timetable, London time
11:25BA 419 from Luxembourg at the gate
10:35SK 804 to Oslo leaves the gate
23 h 10 apart on the timetable, overnight
SK 804 leaves 23 h 10 after BA 419 arrives on the timetable: more than half a day, so not a connection we count.