BA 965 then BA 446 at Heathrow
Hamburg → London → Amsterdam
Timetable, London time
21:30BA 965 from Hamburg at the gate
17:45BA 446 to Amsterdam leaves the gate
20 h 15 apart on the timetable, overnight
BA 446 leaves 20 h 15 after BA 965 arrives on the timetable: more than half a day, so not a connection we count.