All the posts below this post - ie older ones - are going to lose their images in a couple of weeks, because I have closed my Photoshelter account! I should of course get around to updating the posts by replacing the source image urls - I will get around to it - but not today - too busy!
In the meantime, for some other great images, take a look at this excellent site:
Walkers Forum.
With thanks to Richard Jennings for his interest in my own stuff!