KL 1003 then BA 540 at Heathrow
Amsterdam → London → Bologna
Timetable, London time
09:00KL 1003 from Amsterdam at the gate
08:25BA 540 to Bologna leaves the gate
23 h 25 apart on the timetable, overnight
BA 540 leaves 23 h 25 after KL 1003 arrives on the timetable: more than half a day, so not a connection we count.