I have found out the meaning of the word Unlimited and it is 5Gb in peak times!
Virgin Media have considered my 5,6GB downloading in peak times as excessive, and they have now put me on their throttle list. So, for this week between 4pm and 12am EVERYDAY my speed is being capped to that of a 64kbps dial up connection… but it feels a lot slower!
I have called and asked for them to reinstate my full speed, I have emailed a request and I even pleaded with the instant messenger help person to give me my broadband back!