But tonight watching Parkinson with Billie Piper, James McAvoy and Jennifer Lopez I realised it is about something else. They all confessed to being worried that some day they would be found out. That what was happening to them was due to luck rather than skill and that some day it might all be taken away.

I remember clearly having this feeling when I was being asked to move up the management ranks in the BBC. I was just doing what felt good, saying what I thought and, if anything, not taking things very seriously and the next thing you know you are a senior manager with a whole bunch of people watching what you are doing and increasing expectations of you.