further boundary extension was granted in 1951 when Clifton and Wilford (south of the River Trent) were incorporated into the city. Electric trams were introduced to the city in 1901; they served the city for 35 years until 1936. Trams were reintroduced after 68 years when a new network opened in 2004. In the sporting world, Nottingham is home to the world's oldest professional football club, Notts County, which was formed in 1862. The town's other football club, Nottingham Forest, had a period of success between 1977 and 1993 under manager Brian Clough, winning the First Division, four League Cups, a UEFA Super Cup and two European Cups. During this time Forest signed Trevor Francis, Britain's first £1 million footballer, who joined the club in February 1979 from Birmingham City. The city was the site of race riots in 1958, centred on the St Ann's neighbourhood. During the second half of the 20th century Nottingham saw urban growth with the development of new public and private housing estates and new urban centres, which have engulfed former rural villages such as Bilborough, Wollaton, Gedling and Bramcote. South of the river there has also been expansion with new areas such as Edwalton and West Bridgford, adding to Nottingham's urban sprawl. Although this growth slowed towards the end of the century, the modern pressures for more affordable and council housing is back on the political agenda and there is now pressure on the green belt which surrounds the city. Government Local government Nottingham City Council is a unitary authority who are based at Loxley House, Nottingham on Station Street. It consists of 55 councillors, representing 20 wards, who are elected every four years; the last elections being held on 2 May 2019. The council is independent of Nottinghamshire County Council but work with them for local developments and other matters. Nottingham, though, remains the county town of Nottinghamshire even though the county hall is in the neighbouring town of West Bridgford where the county council is based. The city also has a Lord Mayor who is selected by city councillors from among themselves. The position is largely ceremonial but the Lord Mayor also acts as Chair of Full Council meetings. The City of Nottingham's boundaries are tightly drawn and exclude several suburbs and towns that are usually considered part of Greater Nottingham. Unlike the city, these areas are governed by a two tier