SK 27 then BA 777 at Arlanda
Umea → Stockholm → London Heathrow
Timetable, Stockholm time
13:05SK 27 from Umea at the gate
12:25BA 777 to London Heathrow leaves the gate
23 h 20 apart on the timetable, overnight
BA 777 leaves 23 h 20 after SK 27 arrives on the timetable: more than half a day, so not a connection we count.