BA 941 then LX 339 at Heathrow
Düsseldorf → London → Zurich
Timetable, London time
07:40BA 941 from Düsseldorf at the gate
20:05LX 339 to Zurich leaves the gate
12 h 25 apart on the timetable
LX 339 leaves 12 h 25 after BA 941 arrives on the timetable: more than half a day, so not a connection we count.