BA 835 then BA 940 at Heathrow
Dublin → London → Düsseldorf
Timetable, London time
19:20BA 835 from Dublin at the gate
19:15BA 940 to Düsseldorf leaves the gate
23 h 55 apart on the timetable, overnight
BA 940 leaves 23 h 55 after BA 835 arrives on the timetable: more than half a day, so not a connection we count.