Perhaps being a parent has changed career more in that you ask yourself how long you'll be away from home. My eldest child is approaching school age so that becomes more important. They're less portable.

The more you do it, the more you learn to concentrate, as a child does, incredibly intensively and then you sort of have to relax. I remember the first film I did, the lead actor would in between scenes be reading a newspaper or sleeping and I'd think, 'How can you do that?'

Particularly at the moment, it's an incredibly optimistic thing to bring children into the world.

Playing the lead in a film where you shoot for three months away from home is not an easy thing for me when my children are in school and my husband is running a theatre company.