Subscriber Traffic Management - details of it are here:
http://allyours.virginmedia.com/html/internet/traffi...

There have been stories that Virgin were/are/will be limiting torrent downloads, but I've not read anything concrete. One example here from Dec 2008 said it would be "next year"
http://www.theregister.co.uk/2008/12/16/virgin_bitto...

OK. Thanks for info.