of the first stage of the Victoria line. The Lea Valley line between Copper Mill Junction and Cheshunt was electrified at 25 kV in 1969. Many of the private goods sidings were removed at this time. Prior to electrification, between 1958 and 1969 passenger services between Cheshunt and London Liverpool Street through Tottenham Hale were normally operated by Class 125 diesel multiple units (which had been purpose-built for the line). When sectorisation was introduced in the 1980s, the station was served by Network SouthEast until the privatisation of British Railways. In the late 1990s, at the same time as the Stansted Express service to Stansted Airport was started, the British Rail station at Tottenham Hale was totally rebuilt; the Underground station was revamped at the same time. None of the original Victorian station now exists. With the privatisation of the UK's railways in 1994 operation of the station was initially allocated to a business unit which succeeded the old British Railways structure before being taken over by West Anglia Great Northern (WAGN) in January 1997. 21st century Initially owned by Prism Rail, National Express took over operation in July 2000. In 1994 responsibility for the operational infrastructure passed to Railtrack. In August 2002 signalling control was transferred to the Liverpool Street Integrated Electronic Control Centre (IECC). The WAGN franchise was replaced in 2004 by One, this was renamed National Express East Anglia. The following year, following financial difficulties, Railtrack was superseded by Network Rail. From 11 December 2005, a new service to and from Stratford reintroduced a direct passenger connection between Tottenham Hale and Stratford via the mainly freight line across Walthamstow Marshes. For many years the only service on this route had been a parliamentary "ghost train" to Enfield Town via Stratford operated to save lengthy closure (to passenger) procedures. In February 2012 operation of the station changed once again, with Greater Anglia taking over the franchise. Tottenham Hale bus station Tottenham Hale bus station is located beside the railway station. Following the 2011 England riots which began in Tottenham, a redevelopment of the tube, bus and rail stations was used to encourage investment in the area. The £110 million bus and rail interchange project for Tottenham Hale was completed in 2014. As part of the project the bus station was roofed with ETFE, which is also used in the Eden Project. The bus station roof was a finalist