BA 58 then BA 782 at Heathrow
Cape Town → London → Stockholm
Timetable, London time
04:55BA 58 from Cape Town at the gate
17:00BA 782 to Stockholm leaves the gate
12 h 05 apart on the timetable
BA 782 leaves 12 h 05 after BA 58 arrives on the timetable: more than half a day, so not a connection we count.