BREAKING British Airways #BA48 from Seattle to London LHR is declaring an emergency

British Airways flight BA48 from Seattle to London LHR is declared an emergency over Ireland. The Boeing 777-200 continued to cruise at 39,000ft.

UPDATE: cabin crew caring for an unwell customer on board so the Captain requested a priority landing.

UPDATE: flight BA48 just landed runway 27R at Heathrow, medical services will meet the flight to provide assistance.