Almost immediately I received a confirmation email saying:
Thank you for contacting the BT Business Help & Support team.
Your message has been received, and your incident number is 111006-001250
We’ll endeavour to answer your query as soon as possible.
The time currently is 20:48 on Friday 7th October. I did hunt around BT’s business support forum this afternoon and found some useful information that might well come in handy should such a problem ever occur again. However I have received no other form of communication from BT.
Enough said? I need a drink!