When I'm writing, I am just doing what feels right for me.

I tell the truth where it's the ethical thing to do, but in terms of entertainment, there's a certain fun and enjoyment that can be added to the experience by a few judicious lies.

The idea of a physical stigma is quite appealing. When I wrote the book of 'Bodies,' there was a lot of that in the book about how there are physical manifestations of psychological problems - I think it's described as 'Narrativizing The Body.'

You can have characters that say one thing and do another, and in certain kinds of drama, you can't get away with that because the audience will become confused - or certainly, the commissioners will become confused and tell you to stop doing it!

In the modern workplace, sexism has adopted a more subtle persona; therefore, people can be accused of sexism where it's far harder to determine whether they're actually committing sexism or thinking in a sexist way.

Some shows do nosedive at the end, or some piece of content could become incredibly controversial and affect the way the show is seen.

I remember watching TV as a kid, and whenever there was some sort of jeopardy involving the hero, I could reassure myself that they were what I'd call a 'can't-die' character, so everything would be OK.

I think it's hugely important to have a strong episode one; you can lose an audience so quickly now. You can't afford to take the attitude that you will use the first one as an introduction and save the high drama for later.

I've never reached the point where I was ready to abandon a series.

I think once you do the unexpected, and you take the viewers to a position of discomfort about being able to rely on characters surviving, then it does completely affect the way in which the drama is viewed.

I love to do things that kind of mess with the movie formula that you can always find the right place to park; you've always got a phone signal. And I think audiences really respond to the limitations of real life when they intrude on drama.

It's always useful to know that people are emotionally invested in a series because it means that you can take them down a certain road, and they should be interested.

We earned the 'Line of Duty' audience's loyalty over a number of years, and I feel privileged to have that.

There aren't a lot of political dramas on TV, and those that are tend to be American.

People are used to watching cop shows in which the cops are very straight down the line and they solve the crimes, but I think people actually have a much more sophisticated and varied view of the police.

The world is a horrible place, but no one worries because we have all been pacified by anodyne television in which incorruptible cops solve crimes, crusading lawyers keep the innocent out of prison, and streetwise social workers rescue children from abuse.

Sci-fi gives you the scope to do grand stories.

Nowadays, you can't broadcast dodgy special effects and then put up a caption saying, 'Sorry, this is what the budget was.' You have to do it with high production values because the audience has been spoilt by the special effects on things like 'The X Files' and 'Independence Day.'

One of the most significant threats to our national security was and is home-grown Islamist terrorism.

For something like 'Line of Duty' to work, it has to be both plausible and unexpected.

'Line of Duty' is a social realist drama, so it's set in a world that has the recognisable features of the authentic world we see around us.

One of the things I learned on medical drama 'Bodies' was that actors can't play ambiguity.

I am a social realist writer.

There's a classic medical aphorism: 'Listen to the patient; they're telling you the diagnosis.' Actually, a lot of patients are just telling you a lot of rubbish, and you have to stop them and ask the pertinent questions. But, yes, in both drama and medicine, isolated facts can accumulate to create the narrative.