This subseries documents Reliant, which was built by Reliant Engineering Company Company (Tamworth) Limited of Tamworth, England (1952-1963); Reliant Motor Company Limited of Tamworth, England (1963-1995); Reliant Motors of Tamworth, England (1995-1998); Reliant Cars Limited of Burntwood, England (1998-2000); and B & N Plastics of Sudbury, England (2001-2002).

Reliant was a British automaker best known for building three-wheeled cars. Founded in 1935 by Tom L. Williams, the firm's three-wheelers were powered by J.A.P motorcycle engines. Because three-wheeled vehicles were not subject to Britain's road tax, Reliant vehicles soon found a customer base in the United Kingdom. By 1938, the company was also building its own engines as well.

Reliant diversified its product line in 1952, when it started building four-wheeled cars. From 1956 onwards, all Reliant vehicles were fitted with fiberglass bodies. In 1969, Reliant took over Bond Cars Limited, a fellow manufacturer of three-wheeled cars. Several cars designed by Reliant were built in other countries, including the Israeli-built Sabra.

Reliant was owned by several parent companies over the course of its existence, including the Hodge Group and B & N Plastics. Reliant ceased all vehicle production in 2002. See also Bond and Sabra.