The BUT 9611T 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 between 1947 and 1951. It was based on the

AEC Regent III The AEC Regent III (also known as Regent 3 or Regent Mark III) was a type of double-decker bus chassis manufactured by AEC. It was mainly built for operation outside London and overseas. It could be fitted with AEC's 9.6-litre diesel engine ( ...

bus chassis, with a total of 138 manufactured for 11 operators in England at Leyland's Ham and AEC's Southall factories.

References

{{British United Traction, state=collaped British United Traction Trolleybuses Vehicles introduced in 1947