The Goshawk Society is an affiliate of the Rolls-Royce Owners' Club (RROC). It is a non-profit organization formed to address the interests of owners and enthusiasts of the pre-war Small Horsepower series of Rolls-Royce (R-R) cars.  These were built from 1922 to 1939, and comprised the Twenty, 20/25, 25/30, and Wraith models. "Goshawk" was the internal code name originally used by R-R in developing the first Twenty.  Ownership of a Small HP car is not required for membership in the Society, but current membership in the Rolls-Royce Owners' Club (RROC) https://rroc.org/ is required.