The UK government has announced very little about the plan and in fact made it clear that the details are yet to be decided
https://www.gov.uk/government/publications/digital-id-scheme...
Yet plenty of people including in this thread have lept to criticising details of a non existent specification.
I find it perplexing. I agree with Tim. This could be done well. The UK Govs Digital Services Department have done fine work in recent years. I have faith in them to pull something like this off well.
Next though, we need an actual tech spec and public technical consultation. Then perhaps we can have a meaningful debate on it.