All transatlantic flights from the UK are grounded because of an air traffic systems problem at Shannon airport in the Republic of Ireland, says BAA.
Delays could be as much as three and a half hours, it is thought.
The problem concerns Shanwick Oceanic Control, which is the airspace area for the north east Atlantic
From BBC website:
http://news.bbc.co.uk/2/hi/uk_news/8288313.stm