How is your box connected to the Hub?
Is it the Freeview HD channels or the Extra Channels in HD? What's your current line speed?
@Ryanharvey These problems are normally caused by broadband connection speed issues. Try these checks and let me know how you get on.
Thanks for trying that @Ryanharvey. I think we'll need to take a closer look at this for you so can you send over the details? You'll get the contact the moderators link in my profile.
Cheers
David