The idea that twenty-five countries - particularly those of the old Eastern bloc - could come together, share common goals and work in the same democratic institutions was unthinkable just a few years ago.

But even 31 years after the UK joined the European Economic Community many people still question whether it is right for Britain to be at the heart of Europe.

The EU has been good for Britain in so many different ways. For example: it is essential for our prosperity - 3 million UK jobs depend on it; it contributes to a better quality of life - whether through enhanced workers' rights or because our air and beaches meet higher environmental standards. And in Copeland Whitehaven harbour, Westlakes Science Park and other important developments have all benefited from European Union Investment.

Britain's membership of an expanded EU is a vital part of our country's economic prosperity and well-being, and an increasingly important element of our political and diplomatic influence in the world. By engaging as a full partner in Europe Labour's approach gives a better deal for Britain, whether on promoting human rights, raising environmental standards or in the negotiation of world trade agreements.

And I know from my own experience as a Minister working with colleagues from across Europe that all our nations have much in common and everything to gain from ever-closer cooperation. Including, I hope, with the eventual adoption of the Euro by Britain.

The continuing uncertainty among so many people about the advantages accrued from EU membership is why I believe it is important for the UK to hold a referendum on the proposed new EU Treaty once it is been finalised.

Whether we need a new constitution or not seems to me to be unquestionable: with the EU increasing to 25 countries (and possibly to 28 within a few years time) it will be essential to modernise and reform European structures just as it was in previous years when the Conservatives signed new EU treaties. But there will remain certain areas of policy where maintenance of control of our affairs is essential. In those areas like taxation, foreign policy, defence, social security, how the essentials of our common law, criminal justice system and so on work, a national veto must remain.

The referendum question will be on the Treaty. But the implications go far wider. The Prime Minister has said, "It is time to resolve once and for all whether this country, Britain, wants to be at the centre and heart of European decision-making or not; time to decide whether our destiny lies as a leading partner and ally of Europe or on its margins."

It is a sentiment with which I wholeheartedly agree and I am sure when the referendum is held so too will the people of Copeland.