BA 865 then BA 1462 at Heathrow
Prague → London → Edinburgh
Timetable, London time
07:25BA 865 from Prague at the gate
19:40BA 1462 to Edinburgh leaves the gate
12 h 15 apart on the timetable
BA 1462 leaves 12 h 15 after BA 865 arrives on the timetable: more than half a day, so not a connection we count.