BA 941 then BA 460 at Heathrow
Düsseldorf → London → Madrid
Timetable, London time
09:30BA 941 from Düsseldorf at the gate
08:45BA 460 to Madrid leaves the gate
23 h 15 apart on the timetable, overnight
BA 460 leaves 23 h 15 after BA 941 arrives on the timetable: more than half a day, so not a connection we count.