this is a patterns i have used with great success on the rivers and still waters.

HOOK- Partridge pre leaded grub hook
thread - 8/0 black
body - silver and black utc wire
legs-claret cock pheasant tail
First tie in a bunch of the cock pheasant pointing forwards,then set the tying thred to the back of the hook resting 1/16" from the end of the pre-leaded body.
Then tie in the silver and black wire and bring the silk all the way back up the hook ad tie off.
You will find ir near impossible to weave the body with the thread hanging.
Weave the wire right up to the eye of the hook, then fold back the cock pheasant and form a head,two or three coats of varnishe and you are ready to fish.
Be aware as to my cost last year if you miss cast and the fly hits the rod it is goodbye.
The weight of the fly is incredible and sinks like a stone
Enjoy