Does the AI has access to newspapers? If John Doe is a MP, then he is probably the most famous Joe Doe in the last 5 years and the AI may grab his photo from a newspaper. I don't know about the national ID in UK, but here in Argentina the national ID number is public. A lot of public documents include "John Doe (DNI 23.456.789)", and the are sites where you can search it (the DB has problems with almost coalitions, so you may get a number 23.456.789 from one "John X. Doe" that is a 50yo in Buenos Aires and another "John Y. Doe" with number 59.876.653 that is a 3yo in Ushuaia, so in many cases it's easy to guess)

> I don't know about the national ID in UK

There isn't one.

^coalitions^collisions