I thought this was a good looking mayfly nymph that is tied well by Kieron. Check it out, it should do well.
Hook: Kamasan b175 Size 12 (similar to Mustad 3906)
Thread: Brown70 UTC
Tail: Flexi Floss
Rib: Pheasant Tail
Blody: Tan Dubbing
Thorax Cover: Pheasant Tail
Thorax: Cream Dubbing
Legs: Pheasant Tail