BA 439 then SV 122 at Heathrow
Amsterdam → London → Ad Dammam
Timetable, London time
16:20BA 439 from Amsterdam at the gate
16:15SV 122 to Ad Dammam leaves the gate
23 h 55 apart on the timetable, overnight
SV 122 leaves 23 h 55 after BA 439 arrives on the timetable: more than half a day, so not a connection we count.