DY 5510 then BA 815 at Copenhagen
Barcelona → Copenhagen → London Heathrow
Timetable, Copenhagen time
19:15DY 5510 from Barcelona at the gate
18:30BA 815 to London Heathrow leaves the gate
23 h 15 apart on the timetable, overnight
BA 815 leaves 23 h 15 after DY 5510 arrives on the timetable: more than half a day, so not a connection we count.