BA 1349 then BA 135 at Heathrow
Saint Helier → London → Mumbai
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
15:05BA 135 to Mumbai leaves the gate
22 h 45 apart on the timetable, overnight
BA 135 leaves 22 h 45 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.