Good news from NATS last night - UK airspace has re-opened:
We are delighted to report that most restrictions on UK airspace began to be lifted at 2134 (local time) this evening, following new guidance from the UK’s safety regulator, the Civil Aviation Authority on restrictions to UK airspace as a result of the volcanic eruption.
Air traffic control services have resumed in the UK with the exception of an area over the north west of Scotland which continues to be affected by a dense concentration of volcanic ash. Based on current information this situation is not expected to change overnight. The situation continues to be dynamic as a result of changing weather conditions and the prediction of dense areas of volcanic ash. NATS will continue to monitor the latest Met Office and VAAC information and the CAA’s updates on the availability of UK airspace.