51st State was one that I loved doing because the character was so out there, and in a way I was sad to leave the character behind. I'm afraid I could never be that cool in real life!

It's very difficult to find the time or the money for people to organize rehearsals for some movies. It staggers me how little preparation often goes into these scenes which are difficult and complicated. You think, "God, it's crazy. I've never met this person before and here I am having to work at how to do a whole performance on the set." It was great to have a few days of just talking to Michael [Caine] and Daniel [Barber] and thinking about the characters and the relationship between them before we started shooting.

It's censorship, really. I don't see why it's not okay for somebody under the age of 17 watch someone smoking when they can watch someone have their brains blown out? My son and I were watching an ad on the television the other day. And it said, "Rated R." He said, "What does 'rated R' mean?" I said, "God, I don't know. You can't watch it unless you're over a certain age."

Accents are very tangible, blessedly, and if you have to do one, it's a way of getting into character. I can read it through a few times and pretend I know what I'm doing!

I spent a lot of time with a real detective, a lady detective inspector who was the only female detective inspector in the whole of East London. She and I hung out a lot. She showed me what she did and I spent time with her. So, [she was] a lot of the inspiration for the way I dressed and sometimes the dialogue in those interview scenes where we're cross examining and questioning the youths and trying to get a confession out of them.

There's something helpful about the fast pace of a TV set where everything has to be finished by the end of the week. You have to finish the episode; it doesn't matter how long you have to go on Friday night, but you have to get it done.

I had friends at school, but I was never part of a gang and I dreamed of that sense of belonging to a group. You know, where people would call me 'Em' and shout across the bar, 'Em, what are you drinking?' after the show.