BA 929 then BA 940 at Heathrow
Hannover → London → Düsseldorf
Timetable, London time
20:15BA 929 from Hannover at the gate
20:05BA 940 to Düsseldorf leaves the gate
23 h 50 apart on the timetable, overnight
BA 940 leaves 23 h 50 after BA 929 arrives on the timetable: more than half a day, so not a connection we count.