BA 349 then EI 165 at Heathrow
Nice → London → Dublin
Timetable, London time
21:05BA 349 from Nice at the gate
14:15EI 165 to Dublin leaves the gate
17 h 10 apart on the timetable, overnight
EI 165 leaves 17 h 10 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.