A number of countries have said they will hold referendums - which may or may not be binding - others have yet to make a final decision.

In the table below, BBC News Online explains which countries are likely to hold referendums and gives an indication of the state of public opinion.

	Public vote?	Poll data*	Main worries
Germany	No	For 68%; Anti 15%
France	Yes	For 62%; Anti 16%	EU seen pushing free-market policies; France and French language losing influence in EU; worries about sovereignty
Italy	Maybe	For 78%; Anti 10%	Disappointment about lack of reference to Christianity; euro blamed for price rises; worries about sovereignty
UK	Yes	For 42%; Anti 24%	Fears over loss of sovereignty and rise of federal superstate
Spain	Yes	For 70%; Anti 10%	Spain lost voting power as a result of constitution
Poland	Maybe	For 65%; Anti 12%	Poland got a "bad deal" on joining the EU; voting powers reduced by constitution; fears of German domination
Netherlands	Yes	For 70%; Anti 21%	Anger over cost of EU and flouting of eurozone stability and growth pact
Greece	No	For 66%; Anti 20%
Belgium	Maybe	For 72%; Anti 12%	Flemish nationalists say constitution heralds federal superstate; fear that Belgium could lose commissioner
Portugal	Yes	For 57%; Anti 16%	Concern that constitution is bad for smaller states
Czech Rep	Yes	For 48%; Anti 18%	Concern that constitution is bad for smaller states
Hungary	Unlikely	For 75%; Anti 6%
Sweden	Unlikely	For 53%; Anti 31%
Austria	No decision	For 60%; Anti 16%
Denmark	Yes	For 37%; Anti 41%	Fears over loss of sovereignty and rise of federal superstate
Slovakia	Maybe	For 65%; Anti 10%	Disappointment about lack of reference to Christianity; worries about sovereignty
Finland	No decision	For 52%; Anti 35%
Ireland	Yes	For 59%; Anti 12%	Concern about implications for Ireland
Lithuania	Unlikely	For 52%; Anti 7%
Latvia	No	For 57%; Anti 12%
Slovenia	Unlikely	For 68%; Anti 12%
Estonia	Unlikely	For 54%; Anti 15%
Cyprus	Unlikely	For 69%; Anti 11%
Luxembourg	Yes	For 75%; Anti 15%	Some concern that constitution is bad for smaller states
Malta	No	For 59%; Anti 17%
* "A constitution for the European Union - for or against?" (Eurobarometer, May 2004)