Cheers. My dish is a generic, circular, non-Sky item. Over the next couple of days I'll take some piccies and upload them, as trying to explain things gets complicated! I could have got the name on the LNB wrong, but the LNB is definitely in what looks like a plastic collar, and it has a sliding cover over the cable connections. I suspect that the installer used a Sky LNB, as I recall that he had Sky stuff in his van, but I insisted on a generic dish, rather than the bigger Sky offering, simply because I wanted the installation to last as long as possible. The reception problems only started a couple of weeks ago, after nearly 10 years of trouble-free service.