In reply to georgeg:
I thought thats what it might be, it lookes quite difficult to reach the top from that point, sadly now only the hex he placed is still there, the cam was badly damaged and rusted and just pulled straight out when I went to check it, I have another large hex similar to the one that is already there that I will replace it with next time I am there.
also a clean up is going to take place that is being organised by martin from the BMC, he emailed me earlier today and said it might be a better idea if only some of the routes were cleaned up as quite a few of them are quite dangerous.
let me know if you would like to help, or better yet contact martin directly at the BMC, he will be able to give you more information than me.