I write what I call precinct drama, and I tend to write things set in the workplace. Having an institution which gives a workplace its distinctive identity is really important to creating something which feels different.

In real constabularies, the relevant department that is the subject of 'Line of Duty' is called Professional Standards. However, 'Line of Duty' is set in a fictional anticorruption department, AC-12, in order to prevent any unintentional resemblance to actual units, cases, or individuals.

I come from gender-balanced workplaces. I started off working in medicine, and when I went through med school, it's 50/50 men and women. And when I started working as a doctor, it's 50/50 men and women. So I've always been very accustomed to women occupying pivotal roles in the professional environment.

There are some writers who don't write about people who do jobs. I'm not going to name them, but you watch one of their films, or you read one of their books, and you think, 'What job do they do?' They seem to have a nice house and a nice income. How have they got it?