Until the passing of the Unitarian Relief Act in 1813, it was a criminal offence to deny the doctrine of the Trinity. By 1825 a new body, the British and Foreign Unitarian Association, itself an amalgamation of three previous societies, was set up to co-ordinate denominational activities. However, there was a setback in 1837 when "the Presbyterian / Unitarian members were forced to withdraw from the General Body of Protestant Ministers which, for over a century, had represented the joint interests of the old established nonconformist groups in and around London".