Gazza it's an extra-long shank hook I bent myself, although there are Eagle Claw 60 degree jig hooks that are even better for the job. I used a bit of silicone in the body ahead of the hook bend to mimimise tail wrap. Materials are a bit of flash and various colours of DNA fiber (I saw excellent SA-made equivalents - check out Eikendal fly-talk shop).
Here's a pic - a bit tatty after a few elf had monstered it:
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