BA 1385 then AI 2018 at Heathrow
Manchester → London → New Delhi
Timetable, London time
08:55BA 1385 from Manchester at the gate
21:05AI 2018 to New Delhi leaves the gate
12 h 10 apart on the timetable
AI 2018 leaves 12 h 10 after BA 1385 arrives on the timetable: more than half a day, so not a connection we count.