Earlier quoted context omitted.
I would be pretty surprised. Not everyone in the UK has ID, and since the NIC scheme failure, it's less likely than ever to happen. ID isn't even required to vote at the moment...
That is a minor oversight that will probably be rectified at some point — other countries are doing it, it is already required in Northern Ireland, and in 2018 a pilot will be held introducing the requirement in a number of districts¹. People likely won't resist it too much. We've had this identification requirement imposed upon us in the Netherlands a few years ago, and while there is valid criticism on this require…
Only an extraordinarily confident and popular government would have another go (and it's not what the UK has now).
As for the voting scheme you describe, it's entirely voluntary, for 2018, and no council has signed up yet.
Things may move in that direction slowly, but to suggest that the UK is particularly close to requiring ID for internet accounts is downright silly I'm afraid.