I've already spoken to my local Tax Office about this as i visit at least once a year to file my claim for a refund of the Tax Interest Payments taken by the Banks on our Accounts holding the Funds for Visa.
As i already have a Tax Number and ID Card for this purpose i asked if i will need another one later for these new rules and they laughed and said 'probably not in your lifetime'. They went on to say they have recieved not a single word from Head Office about any forthcoming changes but, as you are already a registered claimant if there are any changes you will be informed accordingly. Parting shot from them was 'see you next year when you claim your refund'.