BA 793 then SQ 321 at Heathrow
Göteborg → London → Singapore
Timetable, London time
22:10BA 793 from Göteborg at the gate
21:45SQ 321 to Singapore leaves the gate
23 h 35 apart on the timetable, overnight
SQ 321 leaves 23 h 35 after BA 793 arrives on the timetable: more than half a day, so not a connection we count.