Comment by pjc50
> If you have an address, you have a proof of address
No! This is another one of those things that ends up being a serious problem for a few people, because the current proof of address standard is "utility bill".
> you are changing topic
This seems to be particularly bad in the "digital ID" discussion, almost every speaker including official sources seems to mean something slightly different by this phrase.
You just need something with you name and address. Bank statements, council tax, driver license (it doesn't even need to be a full one). It doesn't need to be a utility bill, it just often is one.
If you do not have a permanent address (I didn't for many years). You just need someone with a permanent address where these things can go e.g. friend or family member or you can pay a small amount for a letter box with a key (which is what I did).