Sheffield exists to promote chamber music. It describes itself as the largest promoter of chamber music outside London. Sheffield has two large theatres, the Lyceum Theatre and the Crucible Theatre, which together with the smaller Studio Theatre make up the largest theatre complex outside London, located in Tudor Square. The Crucible Theatre is the home (since 1977) of the World Snooker Championships and hosts many well-known stage productions throughout the year. The Lyceum, which opened in 1897, serves as a venue for touring West End productions and operas by Opera North, as well as locally produced shows. Sheffield also has the
Transport in Sheffield highways. Deregulation of UK bus services in 1986 brought an end to the local authority's direct control of the provision of local bus services, in essence leaving the bus companies to decide where, when and how often to run services, and compete commercially with each other although SYPTE still maintains an advisory role and funds the running of some non-commercially viable routes that are considered socially essential. Transport in Sheffield Transport in Sheffield, England is developed around the city's unusual topography and medieval street plan. Once an isolated town, the transport infrastructure changed dramatically in the 19th and 20th centuries.