BT have now transferred emails from what used to be known as BTYahoo and is now known as BTMail. If you go to the log in page here
Email Login Page
then you can enter your email address and underneath the password box is a link "Forgotten password". If you click on this (the word "password"), you will be taken to a page to enter your username (email address). Clicking continue will put a green tick against the email address (it does, I checked it with your email address) and then be taken to a page where you can choose how to receive a password reset email (martin.****@****asandadamson.com)
or a password reset text message (********6333)
If you no longer have access to this email or this phone then I am afraid you will have to brave the BT phone system so that they can reset your password !!
Hope this is helpful, if so would you please register that with Fixya