I know it's a bit long after the event, but I thought you may be interested
some photographs I took back on the 24 October 2003 of a circular hole in
high cloud, seen near Blandford Forum, Dorset. I was reminded of them when I
saw the item on the BBC News site about a similar thing happening in Mobile
Alabama -
http://news.bbc.co.uk/1/hi/sci/tech/3394461.stm

I have since found that there was a thread started by Maurice Gavin in this
group about similar cloud formations over SW London just a few days earlier,
on 19 October.

Anyway, you can see my images at
www.mybitoftheplanet.com/forums/cloud.html
I don't usually point my camera skywards, but it was the first time I had
seen one of these.

Cheers,

David Jones,
Garden Wildlife Diaries at www.mybitoftheplanet.com