Assistance
She's not on BT, but the current provider (NTL? Virgin?) may have something similar - we'll ring them up and ask :)
(calamarain just invented dehydrated water, Mon 7 Sep 2009, 23:39, 2 replies)

Give em a rig
And see what they say.

Can you rig some form of recording device If so, then go menu and speak to the guy, get as much a poss then take it to the phone company and police. yes you have number ithheld but the phone company will have records. You may even be able to do a data protection act access and get the number. But by the sounds of thinsg you will probably need to invlove the police.

I have been drink so my advice may not be that sound. BUT judge by the person's tactics they will only respond to heavy fine and jail time.

StyX
(StyX is staring at you, yes YOU!!!, Tue 8 Sep 2009, 0:23, closed)

Sounds about right.
That crap can be traced with a court order, so she/you should be able to get him done with a little digging.
(Scritty Bakerman., Tue 8 Sep 2009, 0:55, closed)

"I have been drink"
Mind if I steal this expression? It's great!
( The Incredible Sulk Finally remembered his password on, Tue 8 Sep 2009, 1:38, closed)

Who's she with, if you don't mind me asking?
(Pope Jamiroquai III, Tue 8 Sep 2009, 1:11, closed)