BA 793 then SQ 319 at Heathrow
Göteborg → London → Singapore
Timetable, London time
21:10BA 793 from Göteborg at the gate
20:35SQ 319 to Singapore leaves the gate
23 h 25 apart on the timetable, overnight
SQ 319 leaves 23 h 25 after BA 793 arrives on the timetable: more than half a day, so not a connection we count.