In my experience, if you want to send copy-protected HDMI over Ethernet, you're going to pay through the nose to get a solution that works, and I was never able to find a direct-to-consumer solution that we liked. There are products out there that work well, but from what I've seen, you have to source those through an integrator. What we settled on was a TiVo network over Cat6 (two DVRs and four Mini TiVos). We started with MOCA (multimedia over coax) but found Ethernet to be more stable. We have dedicated Ethernet home runs that all run to a separate Unifi switch so the traffic between units doesn't clog the rest of our network. That switch is connected to the LAN for streaming traffic.
I'm just glad that we don't have to pay UK Television Licence fees--we'd be on the hook for nearly £1,000 per year...