BA 371 then BA 143 at Heathrow
Toulouse → London → New Delhi
Timetable, London time
11:25BA 371 from Toulouse at the gate
11:10BA 143 to New Delhi leaves the gate
23 h 45 apart on the timetable, overnight
BA 143 leaves 23 h 45 after BA 371 arrives on the timetable: more than half a day, so not a connection we count.