Thanks for your interest. Do you really think the Hub 3 could be the issue? I have no problem with Netflix or any other catch-up, including normal iPlayer, only on the live shows. Unfortunately my Hub 2 has gone to heaven.
I do have a PS3 connected to same hub so I will see if same problem occurs and report. Also have a Virgin Tivo but iPlayer or on-demand never worked properly on that anyway hence the purchase of the Humax!
Update: Just found PS3 doesn't appear to have a "from start" option for live progs on the iPlayer app.