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

Labour is the party of law and order in Britain today. Tough on crime, tough on the causes of crime.

You choose your own reality and you - social media then amplifies those conspiracy theories. So that's why I say social media is itself a revolutionary phenomenon.

I think I made the wrong career choice

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.

Sometimes it is better to lose and do the right thing than to win and do the wrong thing.

If you are trying to take a difficult decision and you're weighing up the pros and cons, you have frank conversations. Everybody knows this in their walk of life.