 The service was scheduled to take 60 minutes for the 51-mile express journey.Three five-car all-Pullman electric multiple units designated 5-BEL were commissioned by the Southern Railway as the flagship of the world's then-largest electrification project, which covered over 160 track miles.The 15 cars – built in 1932 by Metropolitan-Cammell at its Saltley works in Birmingham – were operated in trains comprising two units, the remaining unit normally held in reserve.