BA 1361 then IB 716 at Heathrow
Manchester → London → Madrid
Timetable, London time
11:30BA 1361 from Manchester at the gate
11:25IB 716 to Madrid leaves the gate
23 h 55 apart on the timetable, overnight
IB 716 leaves 23 h 55 after BA 1361 arrives on the timetable: more than half a day, so not a connection we count.