We're about two minutes past our time on that, Mr. Boots. I'm afraid we'll have to get back to you.
Colleagues, we've run quite a bit over on the opening round, which I'm frankly happy with because the answers have been incredible. Going forward, can we please leave a lot of space? If you have an open question to Professor Clarke or Mr. Boots, leave enough time for them to respond.
Mr. Barrett, the floor is yours for five minutes, please.