BA 929 then AM 8 at Heathrow
Hannover → London → Mexico City
Timetable, London time
22:35BA 929 from Hannover at the gate
22:30AM 8 to Mexico City leaves the gate
23 h 55 apart on the timetable, overnight
AM 8 leaves 23 h 55 after BA 929 arrives on the timetable: more than half a day, so not a connection we count.