BA 941 then BA 582 at Heathrow
Düsseldorf → London → Milan
Timetable, London time
09:30BA 941 from Düsseldorf at the gate
08:15BA 582 to Milan leaves the gate
22 h 45 apart on the timetable, overnight
BA 582 leaves 22 h 45 after BA 941 arrives on the timetable: more than half a day, so not a connection we count.