Well, I have made a bit of progress since my last post. Firstly I have now at least heard of spore prints, which no one has ever mentioned to me before. I went out today armed with my book and followed some previous advice I had been given to only eat a very small amount first, even though I am only choosing fungi which are pretty distinctive from now on!
Secondly I have found a good site to help with identification. It seems very comprehensive!