It was quite a European war until 1917, when the Americans joined up. They don't have the same sense of the loss of innocence and the cataclysmic loss of life. A whole generation was wiped out.

Joanna points her camera at a section of society unused to having cameras pointed at it. But I don't know about categorising them in terms of class; I'm a bit wary of that. My dad is the son of a shipbuilder.

I never get afraid of things. I only get excited.

I try not to make plans. God always laughs at your plans.

My father and I used to tussle about me becoming an actor. He's from strong, Presbyterian Scottish working-class stock, and he used to sit me down and say, 'You know, 99 percent of actors are out of work. You've been educated, so why do you want to spend your life pretending to be someone else when you could be your own man?'

I fundamentally believe that in the moral balance of the human race, we right ourselves. If we feel like the ship's keel is off, we find a way to steer ourselves through the storm repeatedly.

Do the work, enjoy the work, take it seriously, don't take yourself seriously and keep your head down!