BA 1341 then BA 580 at Heathrow
Newcastle → London → Milan
Timetable, London time
08:15BA 1341 from Newcastle at the gate
07:35BA 580 to Milan leaves the gate
23 h 20 apart on the timetable, overnight
BA 580 leaves 23 h 20 after BA 1341 arrives on the timetable: more than half a day, so not a connection we count.