BA 929 then SK 1508 at Heathrow
Hannover → London → Copenhagen
Timetable, London time
22:35BA 929 from Hannover at the gate
19:30SK 1508 to Copenhagen leaves the gate
20 h 55 apart on the timetable, overnight
SK 1508 leaves 20 h 55 after BA 929 arrives on the timetable: more than half a day, so not a connection we count.