Hi,
The info below is on their help pages under House Moves -
http://www.plus.net/support/customer_service/house_moving.shtml, there's a number for BT there you could try.... I'm the OP for the long house move thread on this forum, just had a nightmare trying to move house with PlusNet and it turned out to be due to a tag on the line - took them > a month to work it out. Unfortunately, with only limited internet access at work, I didn't see the info below so didn't get a chance to try it myself...
c. Tags On The Line
A tag, or marker, is placed on a line to indicate that the line cannot have a broadband service installed on it. There are 2 types of marker.
* Broadband marker � this is the most common marker, placed by another service provider when they are responsible for providing a service on the line. If someone moves house but the marker is not removed, this will prevent us from placing a broadband order.
If a tag is on the line, then it is possible to arrange for BT Wholesale to remove it. BT have a dedicated �tags� team who can be contacted on 0800 1690934 - you can call them and arrange for the tag to be removed from your line.
* Hard marker - this shows there is something physical stopping the broadband being activated on the line. If the property is old, it may have an old style BT bell box (installed before modern phone sockets and didn�t have a connection point, as the phone was effectively hardwired into the line).
Without a phone socket, there would be nowhere to plug your micro filters in. In addition there would be no connection for your broadband equipment, so the line cannot have a broadband order placed on it.
If there is a hard marker, it will be necessary for you to call your phone provider and ask them to have that marker removed from the phone database, this will then allow us to place your broadband order.
Hope it might help? Although, one would think this was PlusNet's job - you have to wait for them to tell you if there might be a tag, then find this phone number because they don't give it to you directly, and then phone BT yourselves, then PlusNet try connecting again...
Vanda