The UK does not have a "national identity card" and attempts to introduce one were... lets say not a political triumph.

The main way you might be required to identify yourself in the UK is if a Police Officer says either you are suspected of a specific crime, or you are a witness to such a crime. In both cases officers are entitled to you truthfully revealing your name and address as part of investigating the crime, but they aren't entitled to see a photo ID as you may not even own such ID. If you refuse to identify yourself in either of these cases, or the officer believes your answer was deceitful, they can arrest you (which if you were a suspect was likely going to happen anyway).

Auditing Britain, dj media and dje media on yt would care to differ.

in the uk you will effectively need a photo id (passport, driving license etc.) i had to get a passport in order to sell a flat i had owned for 30 years (i needed no id to buy it). the whole anti-money laundering thing has gone mad here.