The 1983 Tube Stock could be considered the last train to be designed by London Underground; it was the last conventional Tube train in the long line of evolving design since the 1938 Tube Stock. The stock was built by Metro Cammell to replace the 1972 Mark II Tube Stock operating on the Jubilee Line; in turn this was intended to enable those trains to replace the ageing 1938 Tube Stock on the Bakerloo Line. The 1983 Tube stock owed much to the sub-surface D Stock in design. Like D Stock, the 1983 Tube Stock had single leaf doors, a similar orange interior and cab design.