BA 1349 then BA 169 at Heathrow
Saint Helier → London → Shanghai
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
12:25BA 169 to Shanghai leaves the gate
20 h 05 apart on the timetable, overnight
BA 169 leaves 20 h 05 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.