Marshall & Tweedy was an architectural partnership formed in Newcastle-upon-Tyne, England in 1899 by Charles Thomas Marshall (1867-1940) and William Tweedy (1872-1951). In the late 1920s they opened an office in London which was run by Charles Thomas Marshall's son, Charles Beresford Marshall (1899-1944).
By the mid-1930s, Charles Thomas Marshall appears to have reduced his involvement in the practice and John Alexander Bourn (1886-1948) and Lionel Hugo Fewster (1904-1957) had become partners in the firm. In The London Gazette of 16 March 1937 it was announced the the partnership had been dissolved as of 1 August 1936, and that in future the business would be split into two distinct practices - Marshall, Tweedy & Bourn, run by Tweedy and Bourn, and Marshall & Tweedy, run by Charles Beresford Marshall and Fewster.
The partnership between Marshall and Fewster was dissolved in 1941 when Marshall left to join the Royal Air Force. However, Fewster may have continued to run the practice for some years after this with the title unchanged as the practice did not close until 1984.