hi
notts has an arg but i'm not sure how active it is. try it and see although it's definitely worth trying the derbys and s yorks ones as well as i know they are involved in surveying etc and may be able to help as part of that process. it may be getting a bit late for optimum conditions though.
ARG-UK - Amphibian & Reptile Group of United Kingdom
cheers and good luck
tim