Thanks for your help in solving this mystery Ironfan.

Please pass on my thanks to the guys on fencecheck.com

The disks will be destroyed after I have found a programe that will open a Canon file that is also on the disk. I cannot tell you what it is at the moment as I am at work.
Perhaps someone can open it for me and see if it reveals anything. I will check later today.

StevenH, how do you arrive at the B52 is at Mildenhall when the background is all sky, just a thought?

Brian.