thumb|T Stock train passing Neasden Depot in 1959 On 1 July 1933, the Metropolitan was amalgamated with other Underground railways, tramway companies and bus operators to form the London Passenger Transport Board, and a period of rationalisation followed.
thumb|t stock train passing neasden depot in 1959 on 1 july 1933 the metropolitan was amalgamated with other underground railways tramway companies and bus operators to form the london passenger transport board and a period of rationalisation followed