British Rail Class 126

British Rail Class 126
In service	1957-
Manufacturer	BR Swindon Works
Number built	1957
Operator	British Rail
Specifications
Car length	64 ft 6 in
Width	9 ft 3 in
Height	12 ft 9 1/2 in
Maximum speed	70 mph (112 km/h)
Weight	38 tons
Engine(s)	BUT (AEC) 150 hp

The introduction of what became the Class 126 diesel multiple units originated in a British Transport Commission report of 1952 that suggested the trial use of diesel railcars. BR's Swindon Works were chosen to design and build express units for the ex-North British Railway Edinburgh Waverley to Glasgow Queen Street route. Swindon built a second batch in 1959/60 for use on services from Glasgow to Ayrshire.