The passenger's death reportedly triggered a medical emergency involving a pregnant woman on board the aircraft.
British Airways issued an apology for the inconvenience, with a regional manager confirming the deceased was terminally ill.
Separately, an Air India flight was grounded in Birmingham after its emergency power device, the ram air turbine, unexpectedly activated during descent.
Following this incident, the Federation of Indian Pilots has urged regulators to ground all Boeing 787 Dreamliner aircraft in India.