Moving Sub accounts from one Primary account to another

[jason_smith_gb]

My dad has a HomeHub 5/BT account.
I also have a HomeHub 5/BT account.

My main email is a sub account of his HomeHub 5/BT account. This used to be my BT account when I lived there and dad took it over...

I would like to move my sub account under his BT HomeHub 5/BT account to be under my HomeHub 5/BT account.

Can this be done? If so, how?
I believe if I delete a sub email, I cannot then set it up again under my account. Is this permanent, or is there a delay?

Thanks

[licquorice]

Are the email accounts BTYahoo or BTMail? If you are not sure, you can check using this link http://diagnostics.bt.com/login/?workflow=EmailChecker