[mziel]

That's not true in the UK, there's no ID card here. IMO it's quite a nuisance, for example you need to always bring 2 documents to verify your identity and address for a variety of situations (opening a bank account, even opening a new savings account at the SAME bank, renting a new place, new job, mortgage, requesting information from the government).

[guitarbill]

Don't get me started on the UK and the ID card. It's stupidity at the highest level. There is a de-facto "ID", your national insurance number (like a social security number). Except it has no ID features, and cannot be changed. So much, much worse than an ID card. As far as practical ID for bars/clubs, people usually just use a driving license, or are forced to use a passport. Complete idiocy.

(However to get back onto topic, most people in the UK will have a passport, otherwise they should have a NINo allocated at birth. For the people who have neither, the GDPR is the least of their worries.)

[mantas]

Fun fact, in Lithuania people are allocated personal number (similar to NINo?) on birth. ID and/or passport is mandatory regardless.

However, personal number is not guaranteed to be unique because of how it's issued. We have funny stories once in a while when people with similar (or even identical) names happen to have same personal number. A photocopy of ID in important governmental or banking actions.

[rjsw]

... and a surprising number of official documents have errors in them, minor address or name misspellings, that make them invalid for this purpose.