Ola, imagine you're in Spain and you've just pour a refreshing Strya Galicia Cervesa.

You hear the bubbles in the glass calling out.

In the Penly own and broodinging Aleithia since 1906. 100% authentic. But not all Spanish

beers are what they seem. A bit like me. I'm not Carlos from Acrouna. I'm Charles from Cambridge. Estreia Galicia.

Spanish. Not Spanish. Hello and welcome to Trigonometry I'm Francis Foster I'm

Constantine Kisham and this is a show for you if you're bored with people

arguing on the internet over subjects they know nothing about.

At Trigonometry, we don't pretend to be the experts.

We ask the experts.

Our brilliant guest this week is a former BBC journalist and executive.

Robin Aiken, welcome to Trigonometry.

Thank you very much.

Well, for anyone who doesn't know, you will get into the couple of books that you've written

about Bias at the BBC.

Tell us a little bit about how are you in this chair today, what's been your journey through life,

and how have you come to be talking about the issues we'll be talking about today?

Yes, well, I'm a journalist and I have been for 40 years and more.

So my kind of journey through journalism, if you like, was a bit of a march back in time.

In the days that I started, I started out on a local newspaper.

In fact, my pre-story was that I was a medical student. And so I started out at medical school and I was

lazy and feckless and the dean of the medical school had me in and said

Mr Aiken you have been outstandingly idle,

...