I am British, so self love?
There is no ID system in the UK, no internal passport, Drivers License are not required to be in your possesion and until relatively recently had no photo. So there was never anything to ask for. Pretty sure Ireland is the same. US is similar except it seems a DL is often used as a stand in. Or a SSN.
On the Continent internal passports were/are? quite common, now obviously Europe covers a lot of Countries and each has its own regulations and no doubt different levels of enforcement. I do remember it being an issue in France in my younger years but not more recently.
EU has stuck its tentacles into many things, but not this.
David