EI 168 then BA 746 at Heathrow
Dublin → London → Geneva
Timetable, London time
15:35EI 168 from Dublin at the gate
10:30BA 746 to Geneva leaves the gate
18 h 55 apart on the timetable, overnight
BA 746 leaves 18 h 55 after EI 168 arrives on the timetable: more than half a day, so not a connection we count.