BA 569 then BA 746 at Heathrow
Milan Linate → London → Geneva
Timetable, London time
13:40BA 569 from Milan Linate at the gatealso BA 1569
10:30BA 746 to Geneva leaves the gate
20 h 50 apart on the timetable, overnight
BA 746 leaves 20 h 50 after BA 569 arrives on the timetable: more than half a day, so not a connection we count.