Defence of Homeplug.....
Just a quick note in defence of Homeplug arrangements. Sorry I didn't read this earlier - I might have helped. My homeplugs work from a netgear whatever v2. Quite capable of sending 4OD, i-player and all that stuff around the house. I've not tried anything like 1080p, as that is beyond my skills, but you weren't asking that question.
So, in response to Keef's concern about the mains device - it is great!