BA 1443 then BA 572 at Heathrow
Edinburgh → London → Milan Linate
Timetable, London time
12:50BA 1443 from Edinburgh at the gate
11:55BA 572 to Milan Linate leaves the gate
23 h 05 apart on the timetable, overnight
BA 572 leaves 23 h 05 after BA 1443 arrives on the timetable: more than half a day, so not a connection we count.