I saw some British politicians discussing this on Sky last week, and I really don't see the point of the British digital ID.
They say having yet another new ID number will make things "easier." But didn't really say how. Brits already have ID numbers for lots of things. It wasn't spelled out how having yet another number will make things better.
My tech mind tells me that it's just going to save some DB admins from having to JOIN some columns. But a number is a number. Why yet another number?
And the whole thing about having a number will somehow stop people from working illegally seems like a red herring. I believe Brits already have to have a national insurance number in order to work. That hasn't stopped people from working illegally. They talking heads didn't explain what's so magical about this new number that will suddenly do things that the old number or numbers didn't.
/Not a Brit. Just bewildered by what appears to be a solution in search of a problem.