There is nothing like waking up at six in the morning and changing a baby's nappy to bring you face to face with life's reality.

I'm not asking you to agree with me, but at least open your mind.

I had no intention of returning into the British political debate, really at all, even though I've obviously got very strong views on it, until Brexit happened, because I think Brexit is a destiny-changing decision for my country.

We can debate this or that aspect of climate change, but the reality is that most people now accept our climate is indeed subject to change as a result of greenhouse gas emissions.

When my parents were growing up the world's population was under three billion. During my children's lifetime, it is likely to exceed nine billion. You don't need to be an expert to realise that sustainable development is going to become the greatest challenge we face this century

The first rule in politics is that there are no rules, at least not in the sense of inevitable defeats or inevitable victories. If you have the right policy and the right strategy, you always have a chance of winning. Without them, you can lose no matter how certain the victory seems.

If we are going to carry on growing, and we will, because no country is going to forfeit its right to economic growth, we have to find a way of doing it sustainably.