The Straggle Bach Silver Barbless Size 12 is an excellent, Diawl Bach-inspired stillwater nymph with a silver holographic butt and a mobile straggle collar. The silver version gives a cool flash that can suggest trapped gas, a small fry glint or simply a trigger on an otherwise restrained nymph profile.
Fish it in a team on a floating or intermediate line, using a slow figure-of-eight or allowing the wind to drift the flies naturally. Short pulls followed by pauses can activate the collar without making the fly behave like a large lure. It is a useful searching option in clear water and bright conditions. The sort of effective fly that can quickly earn a permanent place in the box.