I have got instincts that, I think, are very much in tune with people's very keen sense to see something different. I did not dream of being in politics since I was knee-high to a grasshopper. I was not involved in student politics, or not in that partisan way.

What I hope is in five years' time, I can go to the British people in the election and say: Lots of you doubted that coalition politics worked, but it has worked.

The British political system and the whole clapped out Westminster architecture, and the language that we use about politics, it's completely unsustainable. You either decide to be part of that transition to do something different. Or you cling to old certainties.

Liberalism is a really old British tradition and it has a completely different attitude towards the individual and the relationship between the individual and the state than the collectivist response of Labour, and particularly Old Labour, does.

I didn't become leader to transform the Liberal Democrats into an enlarged form of the Electoral Reform Society. It's not the be all and end all for us. There are other very, very key ambitions in politics, not least social mobility and life chances, that I care about as passionately if not more.