The main challenge is technology and that's something I really push and work closely with Adidas on. They're real leaders in sports performance; always trying to push that further and further and get the best technology they can. That takes time and has rigorous testing, it's very laborious, but it's also very rewarding. You get to work with fantastic athletes, and that's a fantastic thing that has nothing to do with my day job in ready-to-wear.

I personally love sportswear, and love using it in high fashion.

As a designer I like to work with fabrics that don't bleed. That's why I avoid all animal skins.

I get a real kick out of it, seeing people wear my designs.

It's immoral that people make money out of writing crap, but I try not to obsess about it. I don't want to spend my life being angry.

We try to make earth-friendly decisions whenever we can, as it's part of our brand DNA.

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.