From a release by the ATC unions co-ordination
Serbia Montenegro:
30 mins without take offs (NOTAMed)
Bulgaria:
30 mins without take offs 1200-1230 UTC
Italy:
Under discussion
Greece:
Take offs delayed for a limited period
Hungary
1 minute of radio silence
Malta:
No take offs 1200-1215 UTC
Switzerland:
30mins without take offs (NOTAMed)
Portugal:
1 minute of radio silence
France:
No take offs 1200-1210 UTC
Slovenia:
30 minutes without take offs
Maastricht ACC:
1 minute of radio silence at 1200
Spain:
20 mins without take offs (NOTAMed)
Denmark
1 minute of radio silence
Czech Republic:
1 minute of radio silence, possible period without take offs (under discussion)
Lithuania:
1155-1215 all take offs fromEYVI will be stopped
Austria:
1 minute of radio silence
Finland:
1 minute of radio silence
Just confirmed by the Spanish ATC union:
All departures will be stopped 1200-1220 UTC