British Rail Class 309

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British Rail Class 309
Class 309 NSE & Jaffa Cake.jpg
Two Class 309 electric multiple units coupled together at London Liverpool Street. One of these is in Network SouthEast livery and the other is in "Jaffa Cake" livery with "Essex Express" branding.
In service 1962-2000
Manufacturer BR York
Number built 1962-1963
Formation 2/3/4 cars per trainset
Operator British Rail
Specifications
Maximum speed 100 mph (160 km/h)
Weight

Total - 99 tons (309/1) Only Total - 168 tons (309/2) Only

Total - 167 tons (309/3) Only
Braking system(s) Air (EP/Auto)
Gauge Standard gauge (1,435 mm)
The front of a Class 309 train in blue/grey InterCity livery with original 'wrap around' cab windows at London Liverpool Street station
The front of a Class 309 train in blue/grey InterCity livery with modified front windows at London Liverpool Street station

The British Rail Class 309 "Clacton Express" electric multiple units (EMUs) were built by British Rail (BR) York Works from 1962-1963. They were initially classified as Class AM9 before the introduction of TOPS. These units were the first express 25 kV alternating current (AC) units to be built by British Rail, and British Rail's first EMUs to be capable of 100 mph.