Ruth Rendell

My mother was a Swede who grew up in Denmark. When I go there, I visit the street where she grew up and look at her house, which is still there, and the snowberry bush, from which she ate some berries and had to have her stomach pumped.

The leg system of the beach animals works because of a combination of certain lengths of tubes. Because of the proportion of lengths, the animals walk smoothly. You could say that this range of numbers is their genetic code.

On the surface, it's really easy to dismiss certain characters, but sometimes you find that the most interesting parts are disappointingly shallow. It's your job as an actress to pull that person apart, and work out why they act the way that they do.