LH 1279 then BA 905 at Frankfurt
Athens → Frankfurt am Main → London Heathrow
Timetable, Frankfurt am Main time
20:25LH 1279 from Athens at the gate
18:10BA 905 to London Heathrow leaves the gate
21 h 45 apart on the timetable, overnight
BA 905 leaves 21 h 45 after LH 1279 arrives on the timetable: more than half a day, so not a connection we count.