AC 7058 then AC 864 at Montréal
Toronto Pearson → Montréal → London Heathrow
Timetable, Montréal time
23:56AC 7058 from Toronto Pearson at the gate
19:10AC 864 to London Heathrow leaves the gate
19 h 14 apart on the timetable, overnight
AC 864 leaves 19 h 14 after AC 7058 arrives on the timetable: more than half a day, so not a connection we count.