How to reform high street banking

Here's a simple idea:

Let me take my account with me to my new bank.
including:

My bank account number & sort code
My account history
All standing orders

That is to say make high street banking a commodity service.

They won't like it. They'll squeal. There will be IT issues and it might take years to implement.

But in the end if I can keep my mobile and home telephone number when changing suppliers I don't see it as that much harder to move my account.

This would open up banking to real competition and create real service.

I expect the banks to hate it.