A quick shot of one of my favourite night time sea trout flies - basically a variant of the Black and Silver (I think):

Tube: Guideline FITS # 1 and 3 in black (alternative as here with orange #1 tube).
Thread: UNI 8/0 in black.
Rear body half: UTC Opal Mirage, size L.
Front body half: Veniard Lureflash Mosaic Fritz.
Wing: Black Extra Select Craft Fur from Rainy's with Pearl Krinkle Mirror Flash underneath and Lureflash multicolor flash on top.
Fronthackle: Hen hackle dyed black.
Head: ProTube Soft Disc.