Result from Mr. Murphy, confirmation just received that a cheque will be cut for the outstanding amount. Copy of the email from them. Better to have 14E in my pocket than theirs eh?
Thank you for your email
Please be advised that this charge to your account is called a balance charge. This is an error, as this account is closed.
We will cancel this charge to you account and will be crediting you back this €14.12 by cheque asap.
BT would like to apologise for any inconvenience caused. If you wish to speak to an agent, please revert and we will contact you asap.
Update
Yet another email from BT Ireland, the PA to the Customer Services Director (I assume) telling me someone will respond ASAP, not knowing the issue is being resolved. I did however respond to her pointing her in the direction of this thread with a view to maybe escalating the 'billing issues' they seem to have, not just with me but quite a few others also