One more U.K. seatrout fly that might be worth a try for coastal cutts. Rolled/folded wing instead of stacked/folded version used on the Dark Mackerel.

hook - Dai Riki 899 #6
thread - Danville 6/0 red
rib - small wire silver
body - mylar tinsel silver
hackle - kingfisher blue (2 packs Kool Aid Ice Blue Raspberry/1 cup water)
wing - bronze mallard


Regards,
Scott