BT Direct Debit

As we all know, BT changed their direct debit notice period last October from 10 working days to 8 calendar days from the date on the bill.

At the time, I am sure I read some threads on MSE about this, but now, despite searching, I seem unable to find any thread dealing with this subject.

If I have missed them, could some kind member point me in the right direction to find them.

If they have been deleted, could some kind member indicate why this may have happened.

I am interested to know whether there is any ongoing action (perhaps legal ?) in progress to try to reverse BT’s decision.

Many thanks in advance.