In July last year I took this photo in Ramsley Reservoir. I was told it was a lamprey as no one could think what else it could be!
If you have any ideas then please let me know. Email me at: firstname.lastname@example.org
The following link is to the first Flickr image. There are 2 more photos following on. You do not need to be a Flickr member to see them:
Since writing this post I have had feedback from several people and the consensus is that this is a leech. It is the biggest one I have ever seen but there again, that is not too many. Several quite knowledgeable people still believe this is a lamprey but I must admit that the strength of the leech argument is winning me over.