Open versus closed PKI systems

[Ian BROWN]

>My local pub claims to demand it [a passport or one alternate ID scheme]

Yes, they want an "over 18" credential, not an ID card, like the Portman
Group's "Prove It" card.

>How many people in the UK have an NI card, compared to a driving licence? 

My point was that they are issued, not that people keep them close to hand. 
Certainly for at least the last decade they are posted to all individuals on 
the electoral register as they reach their 16th birthday.

>Unless he needs to access your records based on knowing who you are.
>Which of the several Ian Browns for example...

Which a certificate giving my name wouldn't be much use for -- you really want 
my NHS number. But whether even emergency access to medical records provides 
benefits remotely close enough to the resulting costs in privacy and security 
is something most members of this list seem very doubtful of.