It's such a gift when you know who you're writing for and you know that that actor is capable of so much that you can relax a bit.

It has to be an actress like Marion Cotillard [in Allied] because there are so many levels to it. It's set in the Second World War, when lots of people were doing things that, outside of a war, you wouldn't do, like killing and dropping bombs. She's doing things that one wouldn't approve of, but it's war.

What I wanted to do [in Allied] was get two characters who fall in love for real, across the barricade, and then it transcends the war.

I love cooking and kitchens.It's just a great world, and I wanted to explore it. You see the façade, the outside, the public part, and then you just walk through one door marked "Staff Only" and you're in a different universe.

There's more to come. Series 4 [of Peaky Blinders] is coming soon. But I'm proud of making my hometown, which is considered to be completely unfashionable, slightly fashionable. People actually know where it is now.

I wouldn't put myself in that bracket, but it's one of those things. I think what helps is that we [with Tom Hardey] don't socialize, we don't really know each other, we purely work together.

When I was probably about 10 or 11, and I found it was simply something I could do. When you're at school and you do something and you get praised for it, you think, "Oh, right, well I'll do that." From then on, I always thought I'd be a writer. I thought novels at first, and then I sort of naturally drifted into TV.