Stumped by a caddis fly

In my attempt to identify everything that is living in the UK, I thought that I would start off with this humble caddis fly. My Collins Insect guide kindly illustrates 29 species but also mentions that there are just under 200 species to be found in Britain. As my specimen (photograph above) matches none of them I had to admit that here was a family that needed deeper research. I went onto bioimages brilliant photographic website (thousands of obscure species at your fingertip) but still could not match up my insect. That leaves me with three options: investing in the Field Studies Council 'Guide to adult caddisflies' (only £3.50 folks!); appealing to someone out there knowing what this is; or more likely me never knowing its true identity.

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