The six-car 1973 tube stocks provide services on the Piccadilly line, which were built between 1974 and 1977 by Metro-Cammell. These trains were built longer than the 1959 stock trains to accommodate more luggage space and speed up journey times with more comfort. As of 2020, their livery is of standard London Underground corporate of blue, white and red. They were previously unpainted, exposing the aluminium alloy material. Traction voltage is at current powered by the third and fourth rail. The first of these trains entered service on 18 August 1975. They were refurbished by Bombardier from 1995 to 2000 in Wakefield, Yorkshire. Changes included the removal of transverse seating, strap hangers replaced with grab bars, new floor material and a full repaint into London Underground's corporate livery. A refurbished carriage on one train was first seen in service on 20 January 1991 to test the new interior concept.
The six-car 1973 tube stocks provide services on the Piccadilly line which were built between 1974 and 1977 by Metro-Cammell These trains were built longer than the 1959 stock trains to accommodate more luggage space and speed up journey times with more comfort As of 2020 their livery is of standard London Underground corporate of blue white and red They were previously unpainted exposing the aluminium alloy material Traction voltage is at current powered by the third and fourth rail The first of these trains entered service on 18 August 1975 They were refurbished by Bombardier from 1995 to 2000 in Wakefield Yorkshire Changes included the removal of transverse seating strap hangers replaced with grab bars new floor material and a full repaint into London Underground's corporate livery A refurbished carriage on one train was first seen in service on 20 January 1991 to test the new interior concept