The current ASHTAM states as follows:
A VOLCANIC ASH CLOUD, ORIGINATING IN ICELAND, IS HAVING A
MAJOR IMPACT AFFECTING UK AIRSPACE. UK AREA AFFECTED:
610000N 0100000W 610000N 0000000W 600000N 0000000W
570000N 0050000E 550000N 0050000E 530409N 0031619W
521700N 0004400W 512200N 0041300W 521000N 0062900W
535605N 0053533W 563400N 0040700W 591000N 0052400W
603243N 0100000W 610000N 0100000W SFC/UNL
OPR SHOULD REFER TO VA ADVISORY 20100415/0600 FOR FURTHER INFO.
IN ACCORDANCE WITH ICAO VOLCANIC ASH CONTINGENCY PLAN, NO IFR
CLEARANCE WILL BE ISSUED FOR PENETRATION OF THE FORECAST
CONTAMINATED AREA THAT LIES WITHIN UK AIRSPACE.
No idea how to access the referenced "VA ADVISORY" though, any clues anyone? Edit: The VA advisory is in fact the Met office notification linked by IO540 above
