How can I stop receiving BT phone books?

I thought BT would not make it easy to cancel the massive slab of paper that is the annual phone book. I haven't used it (or the paper Yellow Pages) for years. However, a couple of emails, and I am now on the 'Not to send to' list.

Of course, the reality is I won't know until next year - when they deliver the book to my area again - whether or not any of the distributors pay any attention to the people who who have requested not to receive a copy.

To stop getting the BT phone book, email: directory.products@bt.com