AZ 204 then BA 928 at Heathrow
Rome → London → Hannover
Timetable, London time
15:40AZ 204 from Rome at the gate
14:40BA 928 to Hannover leaves the gate
23 h apart on the timetable, overnight
BA 928 leaves 23 h after AZ 204 arrives on the timetable: more than half a day, so not a connection we count.