Nymphing for salmon is a popular and exciting method on chalkstreams and this fly is one of the best. If you can see the fish, bounce the fly in front of its nose, then raise the rod-point to induce a take. Fish it on a 9-10ft 7wt rod.
Material list for the Marabou and Peacock JW Nymph
Hook: Size 6-8 Kamasan B175
Beads: Two metal beads, preferably tungsten
Underbody: Lead wire along hook shank
Tail: Black marabou, peacock herl and Mirror Flash tinsel
Body: Twisted marabou and peacock herl
Rib: Silver wire