Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,986 pages of information and 232,838 images on early companies, their products and the people who designed and built them.
Established in 1903.
The objectives were: The resisting of undue restrictions placed upon the use of commercial motor vehicles by road authorities; the origination and promotion of improvements in the laws and regulations affecting such vehicles; the support of or opposition to the alterations of such laws and regulations; the popularising and development of commercial vehicles and the collection and circulation of information which is useful to its members. 
Headquarters in 1927 where as follows; 50, Pall mall, London.
List of members in 1927: