This is the FIRST email that I've received on the subject!
The gist of this email is advising me of the actions, that I need to take, BEFORE they start changing over from Yahoo! Unfortunately they also advise that the changeover will commence in May 2014!
I'm really not sure how, on the 19th June 2014, I'm meant to take action BEFORE May 2014!
Just as well that I don't use BT Mail (I get all of my firstname.lastname@example.org emails forwarded to my proper email address)!