 He was elected to the House of Commons as the Member of Parliament (MP) for Clitheroe in 1922, a seat he retained until 1945, and held posts at the Ministry of Transport and Ministry of Aircraft Production in 1941.He was also Chairman of the British Film Institute from 1939 to 1945.Brass was knighted in 1929 and in 1945 he was raised to the peerage as Baron Chattisham, of Clitheroe in the County Palatine of Lancaster.