BA 491 then SK 806 at Heathrow
Gibraltar → London → Oslo
Timetable, London time
16:05BA 491 from Gibraltar at the gate
15:35SK 806 to Oslo leaves the gate
23 h 30 apart on the timetable, overnight
SK 806 leaves 23 h 30 after BA 491 arrives on the timetable: more than half a day, so not a connection we count.