Caption:

Glasgow suburban electrification took place during 1959/1960, initially in the

North Clyde area, with three-car units built by Pressed Steel at their Paisley plant, but serious transformer failures when less than a year old led to the complete class being withdrawn and replaced by steam services until the fault could be rectified. Once sorted they almost became icons of the Glasgow rail scene in their Caledonian blue livery. This is one of the classes leading an Inner Circle service into Glasgow Central in the early 1970s, as the Southern Clyde area had joined the electrified system in 1967, a few new identical units being built for the services. The original batch of trains became Class 303 whilst the identical second batch, built by Cravens in Sheffield became Class 311.