SK 1768 then SK 533 at Arlanda
Prague → Stockholm → London Heathrow
Timetable, Stockholm time
21:15SK 1768 from Prague at the gate
18:10SK 533 to London Heathrow leaves the gate
20 h 55 apart on the timetable, overnight
SK 533 leaves 20 h 55 after SK 1768 arrives on the timetable: more than half a day, so not a connection we count.