I'm on the Lewisham CMTS, and the service is great during the day. After about 6pm performance falls off a cliff, until around midnight or 2am the next day. Downloads are 2Mbps, tops. Here's my TBB monitor from Monday (the connection was barely being used at the time):
http://flic.kr/p/dxX8rZ
I have a thread going over on the VM forums - they acknowledge that my UBR is suffering from high utilisation, but say it isn't bad enough to be escalated to their Networks team yet. You be the judge.
http://community.virginmedia.com/t5/...0/td-p/1526168
SB