Essentially, by 2050 we need all activities outside agriculture to be near zero carbon emitting if we are to stop carbon dioxide levels in the atmosphere growing

I think the wonderment of seeing my two sons developing makes me incredibly optimistic about human potential. It makes you think: 'My goodness. It's a miracle that's going on here. What could the human race do together?'

If you decide to run for the leadership, you have to go through it with the people you love. But you also have to protect them and I am determined to protect my mum.

One of the jewels in the crown of Labour's time in office was the rescue of the National Health Service. As the Commonwealth Fund, the London School of Economics and the Nuffield Foundation have all shown, health reforms as well as additional investment were essential to improved outcomes, especially for poorer patients.

I'm a great believer in the Arsene Wenger school of management - which is, you don't worry about the opposition, you just get your own act together.

The window of opportunity to avoid dangerous climate change is closing more quickly than previously thought.

We are a European nation - must stay one.