London Post Office Railway 1927 Stock

Having been built by English Electric throughout 1927 and introduced onto the London Post Office Railways underground network, the 1927 Stock units quickly proved to be overwhelmed by the amount of mail required to be carried on the network.

Along with this, the 1927 Stock proved to not be very reliable as they suffered from mechanical unreliability and high driving wheel wear, this being due to their fixed wheelbase,[1] while also causing heavy track wear themselves as they had problems with the tight curves on the underground lines.

The first batch of these units also reused the wheels, axles and electrical equipment from the 1927 Stock.

The unit was retrieved by the museum from the London Post Office Railways Mount Pleasant workshops in 2011[2] where after it underwent a process of conservation prior to being put on display.

Each 1927 Stock unit was capable of carrying a single wheeled trolley, in which were housed the mail bags.