I am for secret, dark debates.

You can consider this carved in stone: I rule out becoming Herman Van Rompuy's successor.

I would describe that [friendship with Greek Prime Minister Alexis Tsipras] as a utilitarian friendship. At the time, his country was facing the prospect of leaving the euro zone and many Greeks felt abandoned by Europe. In such a situation, it seemed appropriate to me to present myself as a friend to Greece. It had to do with the country's dignity.

Between now and then, after 43 years of European marriage, the whole body of legislation will therefore have to be disentangled. That entails a whole range of specific and very complex questions: what will be the future legal status of the millions of EU citizens in the UK and the millions of Britons on the continent?

How will the exit affect thousands of British pensioners living in Portugal or Spain who will lose their access to the welfare and health systems? Fifty-three free-trade agreements, which were negotiated by the EU on behalf of all Member States, are also hanging in the balance for the UK.

I prefer to concentrate on my task of leading Europe to the success that our citizens expect. We have to look forwards now because what is at stake is what makes Europe Europe.

The Turks know that if they want to join the EU, then they must respect our rules. We are a union of beliefs, not a bunch of squawking chickens. But if we continue talks with Erdogan, that doesn't mean we have to bow down to him.