I've been on the phone with one of the level 2's in Swansea. He advised to make a post on the official forums, you recon you could post there too mate? The more of us with an issue will be more likely to make them sit up and listen. They raised my fault to networks as a single person fault and that was closed as no info included!
The URL to the thread is :
http://community.virginmedia.com/t5/...6/td-p/2904491
Had it confirmed tonight that the utilisation for me this evening is currently at 27% and has peaked at 57%, they wouldn't raise a fault on utilisation unless it goes above 80%.
He did mention that the network has been showing un-correctable errors tonight, and the night before last, but none last night! Thought we might have cracked it, but these issues come and go, usually lasting 20-30 mins and certainly not the ~5 hours we seem to be affected for at the moment. While I was on the phone things looked perfect and speed should have been fine but only got just over 5Mb.