BA 817 then BA 251 at Heathrow
Copenhagen → London → Santiago de Chile
Timetable, London time
22:35BA 817 from Copenhagen at the gate
22:15BA 251 to Santiago de Chile leaves the gate
23 h 40 apart on the timetable, overnight
BA 251 leaves 23 h 40 after BA 817 arrives on the timetable: more than half a day, so not a connection we count.