British Rail Class 123

class of 10 four-car diesel multiple units built by Swindon Works

The Class 123 was a type 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.

British Rail Class 123
In service1963 - 1984
ManufacturerBR Swindon Works
Number built40 units
Operator(s)British Rail
Car length64 ft 11 1/4 in
Width9 ft 3 in
Height12 ft 9 1/2 in
Maximum speed70 mph (112 km/h)
Weight41 tons 14 cwt