BA 1499 then SK 534 at Heathrow
Glasgow → London → Stockholm
Timetable, London time
08:10BA 1499 from Glasgow at the gate
21:05SK 534 to Stockholm leaves the gate
12 h 55 apart on the timetable
SK 534 leaves 12 h 55 after BA 1499 arrives on the timetable: more than half a day, so not a connection we count.