The BUT 9612T was a two-axle double deck

trolleybus A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tramin the 1910s and 1920sJoyce, J.; King, J. S.; and Newman, A. G. (1986). ''British Trolleybus Systems'', pp. 9, 12. London: Ian Allan Publishing. .or troll ...

chassis manufactured by

British United Traction British United Traction (BUT) was a manufacturer of railway equipment and trolleybuses. It was established in 1946 as a joint venture between AEC and Leyland. History British United Traction was established in 1946 when AEC and Leyland am ...

in 1955/56. A total of 70 were manufactured by

Crossley Motors Crossley Motors was an English motor vehicle manufacturer based in Manchester, England. It produced approximately 19,000 cars from 1904 until 1938, 5,500 buses from 1926 until 1958, and 21,000 goods and military vehicles from 1914 to ...

Stockport Stockport is a town and borough in Greater Manchester, England, south-east of Manchester, south-west of Ashton-under-Lyne and north of Macclesfield. The River Goyt and Tame merge to create the River Mersey here. Most of the town is within ...

factory; 62 for

Manchester Manchester () is a city in Greater Manchester, England. It had a population of 552,000 in 2021. It is bordered by the Cheshire Plain to the south, the Pennines to the north and east, and the neighbouring city of Salford to the west. The t ...

and eight for Ashton.

References

British United Traction Trolleybuses Vehicles introduced in 1955 {{bus-stub