Hi,
My Wife's email address does not appear to be linked to my BT Account anymore. Please can this be added again?
Thanks
What makes you think that it's not linked?
Did you "gift" the email account to your wife at any time?
See link about "gifting" email accounts.
How do I create and activate a new BT Email address? | BT Help
See link about adding a BT email account.
Can I move my BT email address to another account? | BT Help