Input (grade 9): The 1924 London Traffic Act imposed a numbering scheme known as the Bassom Scheme, named after Chief Constable A.E. Bassom of the Metropolitan Police who devised it.
Output (grade 9): The 1924 London Traffic Act imposed a numbering scheme known as the Bassom Scheme, named after Chief Constable A.E. Bassom of the Metropolitan Police who made it.