When the London Passenger Transport Board took over from the District Railway in 1933, 173 motor cars were less than fifteen years old although most of the trailer cars were of the original 'B Stock' wooden type built in 1904–05.
In 1933, when the London Passenger Transport Board took over from the District Railway, there were 173 motor cars that were less than fifteen years old. Most trailer cars, which were of the original 'B Stock' wooden type built between 1904 and 1905, continued to be used.