SR Class CP
The Southern Railway (SR) gave the designation CP to the fleet of AC electric multiple units used on the former London, Brighton and South Coast Railway lines in the Crystal Palace area.
Construction
The CP (Crystal Palace stock) units were built in 1911-1912 to provide the electric train stock required for the LBSCR AC overhead electrification to Crystal Palace and the surrounding area. This stock comprised some 90 cars, which were used in three-car formations, usually (Driving Trailer Composite+Motor Third+Driving Trailer Composite).
Thirty motor coaches and 30 driving trailers were built by the Metropolitan Amalgamated Carriage & Wagon Company and a further 30 driving trailers were built at the LBSC's carriage works at Lancing, West Sussex. Each motor coach had four 150 horsepower Winter Eichberg motors.
After the replacement of the AC overhead equipment by the 660 V DC third rail system adopted as standard by the SR, the carriages that formed these units were rebuilt accordingly.