BA 1355 then BA 752 at Heathrow
Saint Helier → London → Geneva
Timetable, London time
19:35BA 1355 from Saint Helier at the gate
19:25BA 752 to Geneva leaves the gate
23 h 50 apart on the timetable, overnight
BA 752 leaves 23 h 50 after BA 1355 arrives on the timetable: more than half a day, so not a connection we count.