
The president of the European Commission has fanned the flames of British debate  over EU membership by insisting that fiscal union in the eurozone will lead to  "intensified political union" for all 27 member states. 
 "This  is about the economic and monetary union but for the EU as a whole," he  said. 
 "The commission will, therefore, set out its views and  explicit ideas for treaty change in order for them to be debated before the  European elections." 
 "We want to put all the elements on the  table, in a clear and consistent way, even if some of them may sound like  political science fiction today. They will be reality in a few years'  time." 
 Mr Barroso's announcement that he will set out plans  for a European federation next spring, before elections to the European  Parliament in May 2014, will further deepen Conservative divisions over the  EU. 
 The intervention will add weight to the argument made by  Lord Lawson, and other anti-EU Tories, that it is pointless to try and improve  Britain's membership terms when the dynamic, set by the eurozone, is towards a  fully-fledged federal Europe. 
 The commission president's  argument is that as the eurozone adopts federalist structures on fiscal and  economic policy, supported by Britain as necessary for financial stability,  there will also be a need for political structures that will fundamentally  change the way the EU works. 
 "Further economic integration  would transcend the limits of the intergovernmental method of running the EU and  the eurozone in particular," Mr Barroso said. 
 Writing in The  Times today, Lord Lawson, the former Chancellor, has reignited the Tory debate  on Europe by calling for exit from the EU because developments in the eurozone  have changed Europe's politifal structures, an argument that mirrors Mr  Barroso's case for a new federal or constitutional treaty. 
 "The heart of the matter is that the very nature of the EU, and of this  country's relationship with it, has fundamentally changed after the coming into  being of the European monetary union and the creation of the eurozone, of which  - quite rightly - we are not a part," Lord Lawson wrote. 
 Proposals for an EU "political union", with budget policies set in Brussels and  an elected president of Europe, will derail David Cameron's attempts to  negotiate a new settlement for Britain, culminating in an "in or out" referendum  in 2017. 
 In stark contrast to the Prime Minister's call for  Britain to regain sovereignty from Brussels, Mr Barroso has called on all  European leaders to accept that political union is inevitable in order to  confront outright opposition to the EU, such as that from the UK Independence  Party. 
 "This is why I believe the mainstream forces in  European politics must seize the initiative, should leave their comfort zone to  welcome and embrace this debate, rather than relinquish the momentum to  eurosceptic or europhobic forces," he said. 
 "If you believe  in the democratic resilience of Europe, if you take Europe's citizens seriously,  you have to fight with rational arguments and unwavering convictions - and be  convinced, as I am personally, that these will win the debate for us in the  end."