I try to be a positive person, but I'm also always looking and wondering, 'Maybe this could be done differently.' As soon as your mind is in a critical mode, you're halfway through designing; as soon as you start thinking about whether something could be better, you're already halfway through a solution.

You can make people feel valued or cared for by design alone. It's not purely about money. It's about how we choose to value human experience.

The Garden Bridge has not found its right moment, but I hope one day it will and that London continues to be open to ideas that make life here better.

As a teenager, my father took me to the shows at the Architectural Association and to places like Milton Keynes back when it was first being built. But I couldn't find anything for me. There seemed to be despair at the possibility of the built environment possessing any imagination in the real world.

Often the most important moment in the design process is figuring out what the right question is.