I was just listening on the HF radio and heard a Speedbird flight 3576 sending a position report to Chennai Radio (Bay of Bengal area). Checking British Airways website they show this flight routing from Hong Kong to Chennai then on to Stansted. Chennai is in India (aka Madras).
Search for departures, for some reason it doesn't show up if you search for arrivals.
Is this some sort of charter ? VIP ? Cargo ? flight.