I have a lot of respect for the Estonian approach, and I've spent time with their officials and politicians as well.
I think one of the things, to be frank, that we struggled with in the U.K. is that theirs obviously relies on quite a different approach to identity than the one the U.K. has adopted. That forms the core of the system. To be frank, we are still struggling in the U.K. with adopting a reliable and consistent identity framework that would enable citizens not only to easily prove who they are when they're online, but also to prove that a particular dataset belongs to them, which is a much more complex issue. Even if I've proved who I am to a third party, when I turn up at the front door of the National Health Service or the welfare office and try to claim access to a particular record, there's still a need to associate my identity with the particular data held in different data silos across government, and that's proving also to be quite a complex challenge.