British Rail Class 123

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British Rail Class 123
In service 1963-
Manufacturer BR Swindon Works
Number built 1963
Formation unknown
Operator(s) British Rail
Car length 64 ft 11 1/4 in
Width 9 ft 3 in
Height 12 ft 9 1/2 in
Maximum speed 70 mph (112 km/h)
Weight 41 tons 14 cwt

The Class 123 was a design of Diesel Multiple Unit built for British Rail in 1963. They were built by British Rail at Swindon Works, and designed like all Swindon units as inter-city sets. Ten of the four-car sets were built and introduced in 1963. The units bear a visible similarity to the British Rail Class 309, however there is no 'relation' here as the two types were built by different manufacturers for different markets.