Ma leggi i posts o no? Ti sei letto il regolamento TULPS? In iTalia un documento non lo devi avere mentre vai in giro.
In UK per i cittadini British la CI non esiste ancora, e non è necessario avere altre forme di ID. TI riporterò la legge quando ho tempo ma stai dicendo cose incorrette.
Aggiorno:
http://www.asb.homeoffice.gov.uk/members/article.aspx?id=8212
e:
Clause 246: Power to require name and address
600. If the officer believes someone has committed an offence, they can require that person to give the officer their name and address.
Clause 247: Power to require production of licence, etc
601. If the officer believes someone has been undertaking an activity which needs a licence, permit, etc., the officer can require that person to show them that licence. Subsection (2) allows the person to produce the licence later if they don’t have it on them at the time the officer demanded it.