FR 1884 then FR 1791 at Lisbon
London Stansted → Lisbon → Luxembourg
Timetable, Lisbon time
20:20FR 1884 from London Stansted at the gate
14:25FR 1791 to Luxembourg leaves the gate
18 h 05 apart on the timetable, overnight
FR 1791 leaves 18 h 05 after FR 1884 arrives on the timetable: more than half a day, so not a connection we count.