Here is a sweet pattern posted over at FlyFishCalgary.com by one of their UK members. The fly pattern is called a Silk Cut Shrimp and is a variation on Andy Wren’s original version.
Hook: Partridge Salar Double #7
Thread: Black 6/0
Tail: Purple Bucktail + a few strands of pearly Chrystal Hair.
Body: Flat Pearl
Wing: Purple Golden Pheasant Tippet
Hackle: Red Rooster Hackle (Purple on the original)