BA 465 then BA 352 at Heathrow
Madrid → London → Nice
Timetable, London time
19:25BA 465 from Madrid at the gate
18:05BA 352 to Nice leaves the gate
22 h 40 apart on the timetable, overnight
BA 352 leaves 22 h 40 after BA 465 arrives on the timetable: more than half a day, so not a connection we count.