By the time you are 30 you are still trying to make your 15-year-old self happy but you are a different person. You need to be brave and let go of that.

On the one hand Twitter gives you the opportunity to engage with people, which is great, but on the other there are people who feel they can say whatever they want, put poison out there, really, without fear of any repercussions.

When I was at drama school, I wanted to change the world, and thought I had some great wisdom to impart to people about humanity. Now that I'm older, I know enough to realise that I know nothing at all.

The first job I ever did in the theatre, I was supposed to be a genius piano player. I couldn't play the piano, but you just sit there at a piano like you're playing, and suddenly all this amazing music comes out and the audience believes you can do it. It's the same with computers. I love scenes where there are people yanking at monitors, "yes I'll put you through now," and you know they're just doing that. But you can look brilliant at all this technology. I love it.

What's enjoyable for me, as an actor, is to do as many different things as possible.

I think I'm becoming more relaxed in front of a camera. I suppose I'll always feel slightly more at home on stage. It's more of an actor's medium. You are your own editor, nobody else is choosing what is being seen of you.

We knew, very early on, that we had to be very, very clear that directors need to speak to actors and actresses and be very clear about what is expected, and find out whether they're comfortable with that. Wardrobe has to be in place. There have to be checks.