Hi Michlle,
It's a bit of a pain to move my router, to etc. to test the set-up without homeplugs but I'll do that and get back to you if you really think it is necessary. As I said other devices work very well when connected with the same homeplugs in the same sockets.
Just now, I have streamed an on demand programme via bbc iPlayer on the youview box and it works fine but trying a sky sports channel gives me different errors e.g. YVM102 or IPC0611. Then youview completely freezes and is unresponsive for up to five minutes.
Is there anything else you can suggest? Is my youview box faulty?
Thanks again