Sighs.
4/5 of these examples already require proof of identity in various circumstances.
The required identification often comes in the form of either one or a combination of a recent utility bill + driver's license and/or passport.
This can make moving house (as an example) a massive PITA -- now I need 3 documents instead of one.
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On data storage / privacy.
Pubs/bars/clubs have already trialled schemes where the provided Photo ID is stored for a certain amount of time. (I believe fabric had to do this under the terms of their new license). I've not heard of any breaches yet...?
I doubt a digital ID would be very useful in pubs as it can't be linked back to a biometric feature (your pretty face).
Online shops... Meh. Does it really matter if Tesco's knows that I prefer low fat mince to high fat?
Banks, well.... There's not much hope there. They'll use it and the game will change. C'est la vie. I'll either adapt so I can get a mortgage or I'll continue renting.
Edit: on a even deeper level, the reality is that nothing changes. Everyone has some form of UID for me (usually emails). Now it just becomes a standardised identifier across the board.
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I too have low confidence in the current government's ability to do something useful with it.