I'm having the same issue with Netflix and iplayer. Really frustrating, I rang virgin who told me that there is nothing wrong with my signal and they couldn't give me any guidance. Any advice on this would be very welcome.
This was our issue too but it now seems to have been resolved. Hope this advice helps:
None of our streaming services (iplayer, Netflix) would work via the TiVo box without crashing after 20mins or so. However all worked perfectly on the iPad.
We were told on our first call to VM customer service that the TiVo box needed replacing, and an engineer came out to do so. This didn't work so he came out again with another new box. Still didn't work, another call, another engineer visit, another new box. The engineer told us that the TiVo boxes are now made by a different supplier and that mixed with the low broadband package that we have (which is fine for our usage) can no longer support the technology that apps like iplayer and Netflix require (that is my layperson non techy translation, I'm sure it's more complicated than that). But anyway, he did say that some of the old suppliers boxes are still available as reconditioned ones, although they can't tell until they try and we so third time lucky, success! Hope that helps, took patience and persistence and a very helpful engineer but it has finally sorted our issue out.
Cheers for this Mick, it is honestly cracking me up. It just like such a con that the broadband I am paying Virgin for does not work on the box they have provided. Did they provide you with a new box in the end ?