Probably your best bet is either as above push whatever content you can by linking to TalkTalktv store (which IS Blinkbox anyway) or purchase a Chromecast and browse your content from your mobile/tablet and send it to play on the tv that way via the Flixster app.
Basically UV is dying a painful death generally now. UV stores here are either closing (such as CinemaNow UK, Sainsbury's Digital), or pulling out of UV itself (Wuaki). Blinkbox was making a loss so Tesco sold it onto Talk Talk. That's the final UV store available now, hardly a vote of confidence in it.