In 1945, Twickenham became founder members of the
Corinthian League. After an eighth-place finish in the league's first season, Twickenham left the league. The following year, the club entered the
FA Cup for the first time, losing 2–1 against Acton Town in the extra preliminary round. In 1949, Twickenham became founded members of the
Metropolitan & District League, playing four seasons in the competition, before leaving in 1953. In 1953, the club joined the
Parthenon League, winning the league in 1959. Twickenham remained in the Parthenon League, until its dissolution in 1966. ==Ground==