Aha the Old Silk Cut Shrimp
The Purple Ali Shrimp has been designed and tied over here by Andy Wren (London) as the Silk Cut Shrimp. Silk Cut are cigarettes that had/have a purple colour to the packet.
Hook Doubles/trebles 4-10
Tail. Long purple buck tail, with a sparse addition of Crystal hair
Body. Flat pearl Lurex over wet-varnished tying silk with varnish over the completed body for protection
Wing G.P. tippet dyed purple tied to lie horizontal
Collar Purple hen or cock long and full
I took the dressing from Stan Headley Trout & Salmon flies of Scotland. There is nothing new under the sun.