U2 3315 then BA 801 at Keflavík
Edinburgh → Reykjavík → London Heathrow
Timetable, Reykjavík time
19:35U2 3315 from Edinburgh at the gate
11:55BA 801 to London Heathrow leaves the gate
16 h 20 apart on the timetable, overnight
BA 801 leaves 16 h 20 after U2 3315 arrives on the timetable: more than half a day, so not a connection we count.