BA 747 then BA 1454 at Heathrow
Geneva → London → Edinburgh
Timetable, London time
21:25BA 747 from Geneva at the gate
16:00BA 1454 to Edinburgh leaves the gate
18 h 35 apart on the timetable, overnight
BA 1454 leaves 18 h 35 after BA 747 arrives on the timetable: more than half a day, so not a connection we count.