FR 3613 then FR 5997 at Madrid
Prague → Madrid → London Stansted
Timetable, Madrid time
18:10FR 3613 from Prague at the gate
17:40FR 5997 to London Stansted leaves the gate
23 h 30 apart on the timetable, overnight
FR 5997 leaves 23 h 30 after FR 3613 arrives on the timetable: more than half a day, so not a connection we count.