BA 315 then BA 546 at Heathrow
Paris Charles de Gaulle → London → Bologna
Timetable, London time
18:40BA 315 from Paris Charles de Gaulle at the gate
18:10BA 546 to Bologna leaves the gate
23 h 30 apart on the timetable, overnight
BA 546 leaves 23 h 30 after BA 315 arrives on the timetable: more than half a day, so not a connection we count.