I happened to bump into John Crowsley on saturday (06-05-06) where he was carrying out a level 2 assesment in Hunters Hole, and told him of your problem. He stated that there were only a few trainer / assesors for level two in the area and he also said that no one had approached him for assesment. I would suggest that you give his contact details to the outdoor persuits provider
He can be contacted via the BCA web site at
http://www.british-caving.org.uk/?page=68
Althoug he lives in scotland he is regularly working in the South West.