U2 8056 then BY 224 at Gatwick
Barcelona → London → Banjul
Timetable, London time
16:05U2 8056 from Barcelona at the gate
13:40BY 224 to Banjul leaves the gate
21 h 35 apart on the timetable, overnight
BY 224 leaves 21 h 35 after U2 8056 arrives on the timetable: more than half a day, so not a connection we count.