My wife and I both have to do personal tax returns, because we’re both company directors.
We each have to declare all the savings interest earned on accounts in our sole names, and 50% of the interest earned on accounts in our joint names. The bulk of the interest we get is from accounts held in joint names.
So the statement should say (for example) “You earned £10 interest on your personal account (including savings pots) and £90 interest on your joint account (including savings pots)”.
It was just saying “You earned £100 interest on your personal account (including savings pots)” which is factually incorrect and didn’t help us get the figures we need.
The statements were fine last year, incorrect when I downloaded them at the weekend, and have quietly been fixed and are correct again now.