As far as publications for ID'ing our insects are concerned, the very best (endorsed by Staurt Crofts at a talk in Ilkley this season) are produced by the Field Studies Council. I straight away bought the ones on Ephemeroptera,Stoneflies and Caddis flies-they are brilliant. I have been conversing very recently with Oliver Edwards on this matter and here is what he had to say "Richard, do you have the scientific 'Keys' for identification of the various insect Orders? If you haven't, you may want to consider getting them, at least the two dealing with the Ephemeroptera. ( A key to the nymphs of British Ephemeroptera: A key to the adults of British Ephemeroptera: From the Freshwater Biological Association).... or 'A Pictorial Guide to British Ephemeroptera' by Macadam & Bennett ( Field Studies Council) This is useful and quite detailed, but not as detailed as the Keys....but contains all we need for splitting..and more!!" So he endorses them too and Stuart held up a variety of books from the likes of Goddard,O'Reilly etc. and basically said that they were nowhere near as good or comprehensive as these publications and I agree.
The text and keys to the latter publication are by Craig Macadam(Riverfly Partnership) with photos by Dr Cyril Bennett. I think that this cost £15 and the Stonefly and Caddis were I think £5 each. The Ephemeroptera one is spiral bound and laminated, so is great for taking into the field, wheras the other two are sort of fold-out but still laminated
Richard