In 1962, Popjak and I left the service of the Medical Research Council and became co-directors of the Milstead Laboratory of Chemical Enzymology set up by Shell Research Ltd.

At the National Institute for Medical Research, I came into contact with biological scientists and formed collaborative projects with several of them. In particular, George Popjak and I shared an interest in cholesterol.

Part of my childhood was spent in Sydney and part in rural New South Wales, at Armidale.

I was born on 7 September 1917 at Sydney in Australia. My father was English-born and a graduate of Oxford; my mother, born Hilda Eipper, was descended from a German minister of religion who settled in New South Wales in 1832. I was the second of four children.

I think the American people in many cases want to transform our energy system.

But you know you haven't done it all because you know everything keeps evolving and changing; and you know you can evolve with it if you grow and develop as a human being.

It was really, really heartbreaking to not be named to the team in Sochi, but some things are just not meant to be. That experience changed me as a skater. I took a step back and decided that some things are not worth accepting. I wanted to be on another Olympic team. I took time to evolve myself as a person and as a skater.

National governments alone cannot deliver lasting prosperity without a transformation of social and economic development that seeks to minimise risk and seize the opportunity we have.