An EU without Britain, without 1 of Europe's strongest powers, a country which in many ways invented the single market, and which brings real heft to Europe's influence on the world stage which plays by the rules and which is a force for liberal economic reform would be a very different kind of European Union.

I like democracy. I like to be able to throw out my political leaders when they get things wrong, and we don't get to do that with Brussels.

It's not just other countries in Europe having a say over what we do. It's unelected bureaucrats in Brussels on sort of six-figure, huge salaries telling us how we run our country despite having never stood for an election themselves.

2012 has been an extraordinary year for our country. We cheered our Queen to the rafters with the Jubilee, showed the world what we're made of by staging the most spectacular Olympic and Paralympic Games ever and - let's not forget - punched way above our weight in the medals table.

In a global race, can we really justify the huge number of expensive peripheral European institutions? Can we justify a commission that gets ever larger? Can we carry on with an organisation that has a multibillion pound budget but not enough focus on controlling spending and shutting down programmes that haven't worked?

I believe man-made climate change is one of the most serious threats that this country and this world face.

The last thing I'd say is that you can achieve a lot of things in politics. You can get a lot of things done. And that, in the end - the public service, the national interest: that is what it's all about. Nothing is really impossible if you put your mind to it. After all, as I once said: I was the future once.