U2 872 then U2 8317 at Gatwick
Glasgow → London → Pisa
Timetable, London time
17:10U2 872 from Glasgow at the gate
17:05U2 8317 to Pisa leaves the gate
23 h 55 apart on the timetable, overnight
U2 8317 leaves 23 h 55 after U2 872 arrives on the timetable: more than half a day, so not a connection we count.