EC 7681 then BA 481 at Barcelona
Lisbon → Barcelona → London Heathrow
Timetable, Barcelona time
21:50EC 7681 from Lisbon at the gatealso U2 7681
14:40BA 481 to London Heathrow leaves the gate
16 h 50 apart on the timetable, overnight
BA 481 leaves 16 h 50 after EC 7681 arrives on the timetable: more than half a day, so not a connection we count.