BA 903 then SK 506 at Heathrow
Frankfurt am Main → London → Copenhagen
Timetable, London time
17:25BA 903 from Frankfurt am Main at the gate
17:00SK 506 to Copenhagen leaves the gate
23 h 35 apart on the timetable, overnight
SK 506 leaves 23 h 35 after BA 903 arrives on the timetable: more than half a day, so not a connection we count.