BA 807 then UL 506 at Heathrow
Copenhagen → London → Colombo
Timetable, London time
12:50BA 807 from Copenhagen at the gate
12:35UL 506 to Colombo leaves the gate
23 h 45 apart on the timetable, overnight
UL 506 leaves 23 h 45 after BA 807 arrives on the timetable: more than half a day, so not a connection we count.