TU 744 then VL 908 at Frankfurt
Tunis → Frankfurt am Main → London Heathrow
Timetable, Frankfurt am Main time
17:25TU 744 from Tunis at the gate
14:05VL 908 to London Heathrow leaves the gate
20 h 40 apart on the timetable, overnight
VL 908 leaves 20 h 40 after TU 744 arrives on the timetable: more than half a day, so not a connection we count.