"British fussiness at its best."
Yes, because we're aware that once you give these kind of powers to governments, you rarely get to recind them.
What my fear with them is that all the various databases are linked and then it becomes common practice to ask for ID cards when purchasing tickets to travel, at the pharmacists collecting presciptions, withdrawing money from the bank or purchasing alcohol.
Once that occurs, then what if you become a 'person no grata', either intentionally or by accident (Harry Tuttle / Harry Buttle) then you cannot travel, get medicine, alcohol or your own money, and no government should have those kinds of powers.