FR 7595 then BA 631 at Athens
Budapest → Athens → London Heathrow
Timetable, Athens time
00:30FR 7595 from Budapest at the gate
15:00BA 631 to London Heathrow leaves the gate
14 h 30 apart on the timetable
BA 631 leaves 14 h 30 after FR 7595 arrives on the timetable: more than half a day, so not a connection we count.