South Yorkshire Transport

South Yorkshire Transport (SYT) was a bus operator that provided services around South Yorkshire and outlying areas. The company was formed as an 'arms-length' successor of the South Yorkshire Passenger Transport Executive (SYPTE) in 1986, which was broken up as a result of the deregulation of bus services. South Yorkshire Transport operated buses in and around Doncaster, Rotherham and Sheffield with some services extending to Chesterfield, Leeds and Barnsley.

In November 1993 South Yorkshire Transport, now rebranded Mainline, was sold in a management buyout. A 20% stake in the company was divested to FirstBus from the Stagecoach Group in 1995, and eventually in 1998, First purchased Mainline, later rebranding the operation to First South Yorkshire.