Hello,
this is a customer help customer forum and only BT employees are the forum mods
check here and see if any problems listed http://usertools.plus.net/exchanges/mso.php
http://usertools.plus.net/exchanges/?
http://btbusiness.custhelp.com/app/service_status
http://bt.custhelp.com/app/answers/detail/a_id/15036
http://community.plus.net/exchange-information/
All seems fine at the exchange according the the checks.
if you already have an engineer booked then see if that solves your problem and if not post back and see if anyone can help including mods but see if engineer fixes problem