BA 1347 then BA 578 at Heathrow
Saint Helier → London → Milan Linate
Timetable, London time
11:45BA 1347 from Saint Helier at the gate
11:25BA 578 to Milan Linate leaves the gate
23 h 40 apart on the timetable, overnight
BA 578 leaves 23 h 40 after BA 1347 arrives on the timetable: more than half a day, so not a connection we count.