BA 349 then EI 169 at Heathrow
Nice → London → Dublin
Timetable, London time
21:05BA 349 from Nice at the gate
16:20EI 169 to Dublin leaves the gate
19 h 15 apart on the timetable, overnight
EI 169 leaves 19 h 15 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.