EC 1703 then BA 465 at Madrid
Nice → Madrid → London Heathrow
Timetable, Madrid time
20:40EC 1703 from Nice at the gate
18:10BA 465 to London Heathrow leaves the gate
21 h 30 apart on the timetable, overnight
BA 465 leaves 21 h 30 after EC 1703 arrives on the timetable: more than half a day, so not a connection we count.