I'm at a loss to explain this. I've tested your connection extensively and the only thing of note are 2 instances of FEC's (forward error corrections) and reduced SNR (signal to noise ratio) on the upstream segment on these dates/times;
Your Hub is reporting having been connected to the CMTS for the past 15 days. I can find nothing to tally with your graph data. So I'd like to start by arranging for an engineer visit. We'll see if he can find anything before looking into this further. I shall send you a PM in a moment (purple envelope icon, top right of page) and book an appointment when I receive your reply.
Can someone please give me an update as to when Fault F005039426 for SNR and FECS in the Broomhill area will be fixed. Still have disconnections and spikes according to the Thinkbroadand. Between that and the horrific superhub3 that was changed over for the 2nd time I feel that VM is just an unreliable service.
Once the next price rise comes around I feel its time to part ways. Been with NTL/Virgin for 16 years now and over the last while the service has went downhill.