BA 937 then BA 774 at Heathrow
Düsseldorf → London → Oslo
Timetable, London time
19:35BA 937 from Düsseldorf at the gate
18:55BA 774 to Oslo leaves the gate
23 h 20 apart on the timetable, overnight
BA 774 leaves 23 h 20 after BA 937 arrives on the timetable: more than half a day, so not a connection we count.