BREAKING British Airways #BA272 from San Diego to London Heathrow is declaring an emergency. Live:

UPDATE 13:43UTC British Airways #BA272 just safely landed runway 27L at London Heathrow.

UPDATE 13:21UTC British Airways #BA272 has medical emergency on board. Landing in 20 mins.

UPDATE 13:05UTC British Airways #BA272 is still heading to London LHR. Landing expected in 30 mins.