mostly harmless is right, I wonder how large the group who don't have a utility bill in their name is. Our children like so many others, lived in shared accommodation when they left home.
My grandsons live in their mothers tenancy, they're over 18 but won't have utility bills. Neither of them are in employment currently either so if they lived in one of the target areas, would that leave them disenfranchised. I feel ill informed as I've no idea.
I've in the past felt opposed to ID cards but begin to wonder if, provided no one had to pay for them, it might not be the worst idea ever.