I thought we were told there was no threat of ash
http://www.bbc.co.uk/news/uk-13498477<snip>
Flights in and out of Scotland have been cancelled as a volcanic ash cloud from Iceland heads towards the UK.
BA, KLM, Easyjet, Flybe, Aer Lingus, Loganair and Eastern Airways have cancelled services on Tuesday, and some flights over the Atlantic were delayed.
The threat of further disruption led US President Barack Obama to fly out of the Republic of Ireland a day early to get to London for a state visit.
Mr Obama had been due to fly to the UK on Tuesday morning, but White House deputy press secretary Josh Earnest said the decision to bring his arrival forward had been taken "due to a recent change in the trajectory in the plume of volcanic ash".