The Copper John is one of those flies that you will always remember fishing with. One of the true traditional flies that feels like its been around forever. No box is complete without a range of Copper Johns in various colours.
An Olive nymph pattern suitable for imitating both large and small Olives that Trout or Grayling feed on, change the size to match the natural. The fly also has a brass bead to help get down to feeding fish quickly.