BA 985 then BA 1356 at Heathrow
Berlin → London → Saint Helier
Timetable, London time
19:30BA 985 from Berlin at the gate
19:00BA 1356 to Saint Helier leaves the gate
23 h 30 apart on the timetable, overnight
BA 1356 leaves 23 h 30 after BA 985 arrives on the timetable: more than half a day, so not a connection we count.