EC 8064 then A3 607 at Gatwick
Barcelona → London → Athens
Timetable, London time
14:15EC 8064 from Barcelona at the gate
12:15A3 607 to Athens leaves the gate
22 h apart on the timetable, overnight
A3 607 leaves 22 h after EC 8064 arrives on the timetable: more than half a day, so not a connection we count.