On the best days, I stop pleading, stop bargaining and watch-checking and fall into a rhythm so satisfying that I simply forget I’m working. So much of my writing day feels like well-digging. Sometimes I dig 200ft down before coming back up, dry. Every day I search for water.

Instead, I’m here to tell you finding your purpose isn’t enough. The challenge for our generation is creating a world where everyone has a sense of purpose.

When another baby arrived, I realized that the problem could not be solved in the operating room, but that we had to combat the root causes of these atrocities. I decided to travel to the village of Kavumu to talk to the men: why don't you protect your babies, your daughters, your wives? And where are the authorities?

I’m a rather slow writer and I have to go to a coffee shop. I turn my back to the crowd in the cafe, so that everyone’s chatting and the noise of the place rises behind me, and then I just keep my head down and churn out my screenplay. I can’t write at home, because I get too lazy. I’ll just want to watch TV or fall asleep. But I’m not allowed to lie down and fall asleep in the cafe, right? So it kind of forces me to work.

My contemporaries were more upset about the Nobel than I was not to be recognised. One of them labelled it the 'No-Bell' prize! But it was fine by me. There's no Nobel Prize in astronomy and I was really proud that it was my stars that had convinced the prize committee that there was good physics in astrophysics.

I was very, very thorough, making sure I really understood how that telescope worked, and that it was working properly. I was quite convinced that I wasn't clever enough to be in Cambridge and would be thrown out at some stage. My policy was to work as hard as I could so that I'd know I'd done my best. We now label this as impostor syndrome, but we didn't recognise, and certainly didn't name it, back then.

I was really proud that it was my stars that had convinced the prize committee that there was good physics in astrophysics.

Tony was cautious. He suspected I’d wired the radio telescope up wrong. So we checked on another radio telescope on the site. The thing was pulsing nicely on mine but as we stood by the pen recorder of this other telescope, nothing happened. It was a horrible moment. And suddenly there it was, five minutes later because we had miscalculated when the telescope would see it. If we’d miscalculated by 25 minutes, we’d have all gone home and the story would be different.

Yes, in 2018, I was awarded the Breakthrough Prize for the discovery. I was a bit dumbstruck, never expecting that kind of thing to happen. I was keen that the money should be used well and the best way to do that seemed to be to encourage a more diverse research student population from under-represented groups.

They have a lot of extreme physics going on inside them and scientists use them to test theories of relativity on a cosmic scale. Einstein’s theories are checking out pretty well so far.