BA 933 then BA 424 at Heathrow
Düsseldorf → London → Málaga
Timetable, London time
15:00BA 933 from Düsseldorf at the gate
12:30BA 424 to Málaga leaves the gate
21 h 30 apart on the timetable, overnight
BA 424 leaves 21 h 30 after BA 933 arrives on the timetable: more than half a day, so not a connection we count.