The big issue of our time is trying to deal with extremism based on a perversion of religion and how you get peaceful coexistence between people of different faiths and cultures.

My teachers used to call me a failure

If we don't act now, then we will go back to what has happened before and then of course the whole thing begins again and he carries on developing these weapons and these are dangerous weapons, particularly if they fall into the hands of terrorists who we know want to use these weapons if they can get them.

The problem is some of the populism on both the far left and the far right, it can make a Tweet but not make a policy. And, you know, when you are dealing with issues that are as important and serious as this, I understand why people search for simple solutions.

You know, one of the things I've learnt since coming out of office is how much easier it is to give the advice than take the decision. I mean, you know, it's tough.

The great advantage of the Lib Dems is precisely that no-one knows what they stand for.

I'm an avowed centrist, and I believe that - centrism is often - it's almost the wrong word to use, because it's often seen as sort of splitting the difference between right and left.