EW 7754 then BA 699 at Vienna
Hamburg → Vienna → London Heathrow
Timetable, Vienna time
18:55EW 7754 from Hamburg at the gate
18:45BA 699 to London Heathrow leaves the gate
23 h 50 apart on the timetable, overnight
BA 699 leaves 23 h 50 after EW 7754 arrives on the timetable: more than half a day, so not a connection we count.