FR 155 then FR 348 at Madrid
Bristol → Madrid → London Stansted
Timetable, Madrid time
20:00FR 155 from Bristol at the gate
10:00FR 348 to London Stansted leaves the gate
14 h apart on the timetable, overnight
FR 348 leaves 14 h after FR 155 arrives on the timetable: more than half a day, so not a connection we count.