|General Practitioner on a 1/0 low water double|
The General Practitioner, known nowadays as the G.P., was created by Col. Esmund Drury in the early 1950s. A shrimp imitation, Drury created the G.P. when live prawns were banned on the River Test. There have been many variations on Drury's original pattern, though the above were tied true to his instructions, which can be found in Col. Joseph Bates's classic "Atlantic Salmon Flies and Fishing" (except for the addition of a little Krystal Flash on my part).
These two G.P.s, both the original orange and the black variation, were tied on a vintage Partridge low water double. I'm not sure what size it is, but I would estimate it's about 1/0. The hook runs about 4" in total length and will fished with a sunk line in high, cold water.