Jesus, £120?Here are the pics of the marker sent to Mark - Mark's comments have also been aded :-
http://i83.photobucket.com/albums/j3...7/100_0765.jpg
Heres some of the stuff I was able to scrape off, its sort of like a hard wax
http://i83.photobucket.com/albums/j3...7/100_0784.jpg
The frame. Notice the threads stripped out of the hole and you can also see the back part of the trigger in the center of the picture, its difficult to see but thats where the piece has been broken off and now it doesn't reach back far enough to fire the gun. I've been trying to remove the screw that holds the trigger in to get a better picture but thats in a bad way too
http://i83.photobucket.com/albums/j3...7/100_0783.jpg
Another hole thats had the threads stripped out, theres quite a few of them
http://i83.photobucket.com/albums/j3...7/100_0790.jpg