BA 753 then SK 812 at Heathrow
Geneva → London → Oslo
Timetable, London time
07:35BA 753 from Geneva at the gate
19:50SK 812 to Oslo leaves the gate
12 h 15 apart on the timetable
SK 812 leaves 12 h 15 after BA 753 arrives on the timetable: more than half a day, so not a connection we count.