The trial was advertised on Sky's forum. It was only open to Sagem router users. I'd keep an eye on their forum - they may well announce another trial soon.
The company I work for has just added IPv6 to the VPN service. Shame I am not on a ISP supplier that has IPV6. Even more of a shame is that the time to connect has gone up from 20seconds to around 90 seconds (all those IPV6 timeouts before deciding to revert to IPV4). Even better was the company IT support team saying I must have a slow ISP when I asked why the difference in VPN connection time when the VPN software was updated 3-4 weeks ago. Still a lot to learn around IPv6 use, deployment & support.