BA 903 then BA 350 at Heathrow
Frankfurt am Main → London → Nice
Timetable, London time
17:15BA 903 from Frankfurt am Main at the gate
17:00BA 350 to Nice leaves the gate
23 h 45 apart on the timetable, overnight
BA 350 leaves 23 h 45 after BA 903 arrives on the timetable: more than half a day, so not a connection we count.