[Andrea]

Flight Planning Centre - Briefing Information - Sigmet Europe says about
my home:
ESAA SIGMET 2 VALID 180800/181400 ESSA- ESAA SWEDEN FIR VA CLD FCST APRX SFC/FL200 S OF LINE N6300 E01200 N6750 E02350 FL200/FL350 BTN LINES N6300 E01200 N6750 E02350 AND N5900 E01100 N5930 E02100, FCST 1800Z VA CLD SFC/FL350 S OF LINE N6200 E01230 N6800 E02350=

and your home:
EGTT SIGMET 02 VALID 180800/181400 EGRR- EGTT LONDON FIR VA ERUPTION MT EYJAFJALLAJOKULL LOC N6338 W01937 VA CLD OBS 0800Z BLW FL280 ENTIRE FIR FCST 1200Z VA CLD BLW FL280 ENTIRE FIR=

SIGMET - Significant Meteorological Information
EGRR-EGTT - notation, including EGSC (Cambridge Airport) and EGSS (Stansted Airport) among others
FIR - Flight Information Region
VA - Volcanic Ash
CLD - Cloud

and everything is dirty and ...