The British Commonwealth Union (BCU) was a protectionist organisation formed in the United Kingdom in 1916 to "found a solid business group in parliament" and to "press for the protective tariffs and restrictions on imports discussed at the Paris Economic Conference of 1916 and in the on post-World War I commercial policy." Conservative Patrick Hannon was a key figure. As well as being protectionist, the BCU was strongly opposed to trade unionism, and supported a number of anti-socialist and anti-labour activities.