British Rail Class 303

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British Rail Class 303 "Blue Train"
Class 303 at Wemyss Bay (April 1984).jpg
TransClyde branded Class 303 unrefurbished unit no. 303 089 at Wemyss Bay railway station.
In service 1959 - 2002
Manufacturer Pressed Steel
Refurbishment Late 1980s
Number built 91 trainsets
Formation 3 cars per trainset
Capacity 236 seats
Operator British Rail
SPT
Specifications
Maximum speed 75 mph (121 km/h)
Weight 124 t
Power output 618 kW
Voltage 25 kV AC Overhead
Gauge 1,435 mm

The British Rail Class 303 is a type of electric multiple unit. They are also known as "Blue Train" units. They were introduced in 1960 for the electrification of the North Clyde and the Cathcart Circle lines in Strathclyde. At first they were classified as AM3 units before the introduction of the TOPS classification system. They were the dominant EMU on the Glasgow suburban railway network for over 25 years. The final units were withdrawn from service in 2002.