Thanks for the link. Read all that and for the wrong reasons feel a little relieved that it's not just related to Panasonic, and that I am not alone in this. On the contrary. After searching it seems there is a vast swathe of suffering like minded people! I have decided to see if it works any better using either my iMac (wired) or iPad (wifi) to watch some catchup tv and see if it stalls again. Will post back.
Last night I watched a one hour programme on iPlayer on my iPad without any buffering. I shall try on my ethernet wired Mac tonight. If they both work ok then what?
I understand a wired connection is best but if you can't then what? As bratman said above the whole concept is founded on a whim, not established fact!