Running is a huge category for us. To be able to run to work and have lightweight, breathable, windproof materials you can chuck in your bag that work on technical level but also on a lifestyle level are really important to me. I work out - and I think most people do - and I want to encourage women and inspire them in a way that fits in with their lifestyle.

Being effortless is the coolest thing in the world

Depending on the season, between 20 and 30 percent of my collections contain some sort of eco or sustainable element, whether it's a beautiful organic fabric or a natural dye. And obviously I don't use animal skins or fur of any kind.

I am a fashion designer. I'm not an environmentalist. When I get up in the morning, number one I'm a mother and a wife, and number two I design clothes. So the main thing I need to do is create, hopefully, exquisitely beautiful, desirable objects for my customer.

For me, women's ski wear has always been black and, again, not as feminine or sexy as I think it could look while still having the technology there.

I think my mum was really very ahead of her time. She wore very little makeup. She really explored the way that she wore clothes in a very honest way. She wore a lot of vintage stuff and mixed it with bespoke men's tailoring and things like that. That was a huge influence on me, seeing a woman in the spotlight carry herself in that kind of way. But mostly, for me, it was just that she was an incredibly honest and sort of natural person.

A little black dress is something to rely on. To fill you with confidence and ease. To have an attitude that is pure and effortless, yet sexy and classy.