See:
http://www.schneier.com/blog/archives/2006/10/bt_acquires_cou.html#c121821
http://www.counterpane.com/pr-20061025.html
and
http://www.btplc.com/News/Articles/Showarticle.cfm?ArticleID=386c1b2f-0860-4afc-8f4a-26a066c12d10

I’m assuming this ties into the moves afoot by BT to go completely IP on the telecom infrastructure.

Good move.