BA 853 then EW 9463 at Heathrow
Prague → London → Düsseldorf
Timetable, London time
12:30BA 853 from Prague at the gate
12:15EW 9463 to Düsseldorf leaves the gate
23 h 45 apart on the timetable, overnight
EW 9463 leaves 23 h 45 after BA 853 arrives on the timetable: more than half a day, so not a connection we count.