BA 339 then BA 416 at Heathrow
Nice → London → Tenerife South
Timetable, London time
12:25BA 339 from Nice at the gate
12:05BA 416 to Tenerife South leaves the gate
23 h 40 apart on the timetable, overnight
BA 416 leaves 23 h 40 after BA 339 arrives on the timetable: more than half a day, so not a connection we count.