I think if you're starting out, you could follow a track very similar to the Estonia approach. Most people now carry mobile phones or mobile devices around with them. I'm thinking of a principle of using those mobile devices as the core means of proving identity. I use that approach with a lot of my online commercial services. I have two-factor authentication or two-factor verification set up so that when I try to log in online, I get either a time-based code I can read from my phone or a text message is sent to me, which is obviously less secure. I think government could take advantage of the technology enhancements that have happened since the Estonians developed their model to come up with a solution oriented around mobile devices that's probably more amenable to trust.
I think the issue in the U.K. was partly the fact that the Home Office was seen as the arbiter at the national identity register and the feeling that people were going to have to store all of their biometrics and personal data with one single government department. I think that now there would be more effective ways of linking one proven identity to the different data silos or lockers so that I could prove who I was to the NHS, the National Health Service, and prove the link to my health records without necessarily exposing that linkage to perhaps the taxation department or the welfare department, if it were not appropriate for me to do so or there was not a regulatory reason that I needed to do so.