All, sorry to cause so much consternation!! Starview is an "alternative" box for getting non-terrestrial TV channels. It contains a set of codes that get scrambled from time to time - more frequently of late - and have to be changed to carry on viewing. Hope this helps.
Thanks for the link - it provided the answer I was looking for. Have now added it to favourites so shouldn't have to ask the question again, well here anyway!!!