BA 719 then BA 784 at Heathrow
Zurich → London → Stockholm
Timetable, London time
19:15BA 719 from Zurich at the gate
19:05BA 784 to Stockholm leaves the gate
23 h 50 apart on the timetable, overnight
BA 784 leaves 23 h 50 after BA 719 arrives on the timetable: more than half a day, so not a connection we count.