The Wulfrunian was developed jointly by Guy and the West Riding Automobile Company, and of 137 vehicles built, 126 went to West Riding (6 more were acquired second hand). Single vehicles were tried by operators in Lancashire, Wolverhampton and West Wales, but this did not lead to any further orders . After maintenance and reliability issues, West Riding cancelled an order for a further 25 vehicles.
The cost of developing the vehicle combined with the lack of sales, led to an enormous losses for Guy, who first went into receivership in 1961, before finally ceasing production in 1969.
The Wulfrunian was introduced at the Commercial Motor Show in 1958 as a "concept" vehicle designed for one man bus services (i.e. without a conductor). However, it was unusual compared to other developments at the time, such as the Leyland Atlantean and the Daimler Fleetline, in that it combined a front entrance and a front engine (other operators were favouring rear-engined vehicles).
This was the first bus to have air suspension, disc brakes and independent front suspension. The engine, a 10.45-litre Gardner 6LX, was located beside the driver, with the front axle moved back to create space for the entrance. However, the use of so many untested features led to reliability issues, particularly with the brakes and suspension.
In most of the Wulfrunians built, the staircase was situated on the nearside of the vehicle, immediately behind the entrance; to accommodate this the four piece folding entrance doors were of different sizes. The nearside rearward ascending staircase gave the driver full view of the stairwell. In the lower saloon, after the area taken up for the staircase, the first twin seat faced rearwards, and gave a cosy, relaxed feel to the interior.
Two demonstrators were built, 7800DA and 8072DA, both vehicles were painted in Wolverhampton Wanderers colours of yellow and black. 7800DA had several more seats than 8072DA.
The majority of vehicles were fitted with Roe bodies.