UPDATED 2: Ash problem easing?

Eurocontrol’s prediction of the ash cloud through to midday today.
Eurocontrol’s prediction of the ash cloud through to midday today.

April 20: UK air traffic services provider NATS says that the volcano eruption in Iceland has strengthened and a new ash cloud is spreading south and east towards Europe, demonstrating the “dynamic and rapidly changing conditions in which we are working”.
However, in the short term NATS says that based on the latest Met Office information, part of Scottish and Northern Irish airspace including Aberdeen, Inverness and Edinburgh airports will continue to be available from 1900 today to 0100 tomorrow, Wednesday 21 April, and also south to Newcastle Airport. Glasgow and Teesside airports will additionally become available in this time period. Restrictions will remain in place over the rest of UK airspace below 20,000ft.
Flights above the ash cloud are now permitted in the UK; between 1900 today and 0100 tomorrow, this will enable aircraft movements above 20,000ft in UK airspace.
In Europe Eurocontrol confirms that air traffic control services are still not being provided in most areas, including Belgium, Denmark, Estonia, Finland, Germany, Ireland, the Netherlands, northern Italy, Romania, Slovenia, Switzerland, parts of Ukraine and the UK. Flights are taking place in southern and central Europe, including the Czech Republic, the Balkan area, Bulgaria, Hungary, southern Italy and France, Greece, Poland, Portugal, Slovenia, Spain, and Turkey, as well as parts of northern Europe (Norway and parts of Sweden).