@frogesque - My insurance policy was one of the things I was thinking about, in that like you said, the small print may hold some disclaimer about such equipment and it's installation. I will have to have a look, when I can be bothered to go up in the loft and get the policy down- although if we magically get struck by lightning in the meantime, it may come down of it's pwn accord. @everyone - After I posted, it suddenly dawned on me that the majority of peeps have TV/Radio aerials on their roofs, so perhaps I am worrying a bit too much. We don't have an aerial as we are in direct sight of Emely Moor TV Mast but others on the street do. I notice though that a house a bit further up the hill has a lightning conductor on it - think it might be the health clinic so maybe their insurance requires it. Anyway, thanks for the comments so far. I think I will look at my insurance policy to double check - but my gut feel makes me think I probably won't need to bother. It's probably low risk that lightning will strike it. Glyn