BA 126 then BA 546 at Heathrow
Doha → London → Bologna
Timetable, London time
07:25BA 126 from Doha at the gate
20:25BA 546 to Bologna leaves the gate
13 h apart on the timetable
BA 546 leaves 13 h after BA 126 arrives on the timetable: more than half a day, so not a connection we count.