Everywhere in N Europe they are now flying
Largely true but of course a rather general remark which ignores Poland, Denmark and Norway
From the BBC website (so caveat about accuracy):-
EUROPEAN AIRSPACE 0900
BELGIUM - Airspace open: Some planes landing, flights to depart from 1200 GMT
UK - Airspace open over Scotland and Northern Ireland. Limited airspace over north of England. London airports remain closed
FRANCE - Plans to re-open airports progressively on Tuesday
GERMANY - Airspace closed, with some exceptions, until at 1200 GMT on Tuesday. Lufthansa planning to operate 200 flights
IRELAND - Airspace closed until 1200 GMT on Tuesday
ITALY - Airspace open
NETHERLANDS - Airspace open. Passenger flights arriving and departing in Amsterdam
SPAIN - Airspace open; 17 airports operating
SWEDEN - Airspace open
SWITZERLAND - Airspace open
DENMARK - Airspace closed
NORWAY - Airspace closed
POLAND - Airspace closed