BA 1349 then AC 857 at Heathrow
Saint Helier → London → Toronto
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
15:00AC 857 to Toronto leaves the gate
22 h 40 apart on the timetable, overnight
AC 857 leaves 22 h 40 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.