The culprit was a large section of cast iron guttering

003 by charliepridham, on Flickr

002 by charliepridham, on Flickr
Now I must admit that this has been on my "To do List" for some while, the main snag being when to get the scaffolding up as the corner of the house has a bees nest in it, this has been there over 100 years now and is probably partly to blame for the lack of maintenance!
Of course if something falls it generally lands on something, in this case it was my conservatory

001 by charliepridham, on Flickr
amazingly small amount of damage

004 by charliepridham, on Flickr
I managed to effect temporary repairs using some spare greenhouse glass and silicon it it can now wait for next August for the planned rebuild like we did the other end a few years ago (I had been waiting to sort the gutter problem!!)
I put a series of pictures of that rebuild on a thread here
http://pushingtheborders.com/phpBB/view ... p=596#p596