 However, by the 1920s, there was a decline in the use of tramways, and the West Riding Automobile Company was formed to operate bus services from its bases in Wakefield and Castleford.Twenty-two Bristol 4-ton vehicles were purchased at a cost of £30,000, and services began in April 1922.The speed of changeover was rapid, with the Castleford tramway system being abandoned just three years later.