EC 8514 then U2 8843 at Gatwick
Lisbon → London → Reykjavík
Timetable, London time
09:45EC 8514 from Lisbon at the gate
08:00U2 8843 to Reykjavík leaves the gate
22 h 15 apart on the timetable, overnight
U2 8843 leaves 22 h 15 after EC 8514 arrives on the timetable: more than half a day, so not a connection we count.