Thread: Spiderweb
Hook: Tiemco BL103 (size 19 or 17)
Tails: Microfibbet from watercolour wash brush
Body: Niche Microfine dubbing
Wing: Tan Polypropylene floating yarn
Hackle: genetic cock in grizzle or ginger/red game
Catch on thread and run to just behind 2/3rds position of shank
Pinch and loop a length of floating yarn (split out suitable thickness from the full hank) onto the top of the hook shank
The front tag should project forwards over the hook eye
Fold the forward tag firmly over a dubbing needle which is held perpendicular to the hook shank
Trap down with thread wraps until the front and back "legs" of the loop wing touch at their bases
Cut off the waste from the forward facing tag and then trim 2/3rds of the thickness of the rearward tag right next to the rearward "leg" of the loop wing
Move the scissors back a little further and cut about half of the remaining thickness of the tag (this will form a taper when bound down with thread wraps) - move a little further back along the hook shank and snip off the remaining strands of yarn
Run the thread up and down using soft to moderate tension to allow the thread wraps to gather and taper the yarn fibres (don't use more wraps than necessary)
Select 3 microfibbets from a synthetic fibred watercolour wash brush (about £3 from hobbycraft for about £50 to £100's worth of microfibbets if bought separately in packs of 6!!)
Make sure the tips are lined up and that they project approximately the correct length behind the fly before pinch and looping all 3 microfibbets onto the top of the shank in a tight bundle (you can pull them to the correct length after trapping down)
Tails bundled and set to length:
Now splay the tails using pressure from your thumbnail at their base
Lay thread wraps between each splayed tail (pull them into position and lock down with interwoven thread wraps) to set the horizontal splay:
You can see the locking thread wraps a bit better here (from above)
and here from above/side (try not to use more thread wraps than necessary)