Some people wish to keep an email address they have had for a long time but no longer have BT as their ISP, their choice.
Hi. Even though it was bt yahoo at one point? Plus the help chat guy at bt said it was tied to my broadband account. But other people are saying like you. Thanks
This sounds like the "help guy" is getting confused with an internal system yahoo.co.uk attached to every BTYahoo user email address - which is visible in webmail only under settings/mailboxes ... That address can't be used or deleted. Unless they are getting confused with a disposable email address, however these are being discontinued.
As has been said, it is completely different to a standard Yahoo.co.uk email address.
BTYahoo still does exist, but it has nothing to do with standard "vanilla" Yahoo addresses.
You have been told utter cobblers by the useless helpdesk with regard the Yahoo.co.uk email address.
With regard your first post, you said :-
"When I first set off with it years ago yahoo was bt but I'm not sure now"
Yahoo has never been part of BT - so you simply must have set up the Yahoo address independently.