FR 9840 then BA 507 at Lisbon
Cologne → Lisbon → London Heathrow
Timetable, Lisbon time
22:40FR 9840 from Cologne at the gate
15:50BA 507 to London Heathrow leaves the gate
17 h 10 apart on the timetable, overnight
BA 507 leaves 17 h 10 after FR 9840 arrives on the timetable: more than half a day, so not a connection we count.