FR 4596 then BA 497 at Barcelona
Porto → Barcelona → London Heathrow
Timetable, Barcelona time
10:55FR 4596 from Porto at the gate
06:40BA 497 to London Heathrow leaves the gatealso IB 3670, AA 7119, VY 9616
19 h 45 apart on the timetable, overnight
BA 497 leaves 19 h 45 after FR 4596 arrives on the timetable: more than half a day, so not a connection we count.