 The Company bought a fleet of new vehicles from Garretts to operate the services, and changed its name to the Mexborough & Swinton Traction Co in 1929, reflecting the fact that they no longer ran trams.They added a turning circle at Conisbrough High in February 1931, to replace a longer loop around a crescent, and opened a branch along Adwick Road, Mexborough on 28 June 1931.This was intended to be the start of a northern extension, but no further progress was made with this.