BA 389 then BA 1448 at Heathrow
Brussels → London → Edinburgh
Timetable, London time
12:20BA 389 from Brussels at the gate
11:55BA 1448 to Edinburgh leaves the gate
23 h 35 apart on the timetable, overnight
BA 1448 leaves 23 h 35 after BA 389 arrives on the timetable: more than half a day, so not a connection we count.