lens arrangement, in 1935. It was also in 1935 that electrification of the lines through Hackney was suggested, although many years were to pass before these plans came to fruition. The 1935 re-signalling saw the closure of Hackney Downs South signal box with the North signal box (which dated from 1872) becoming plain Hackney Downs. British Railways (1948-1994) On nationalisation in 1948 responsibility for operating the station fell to British Railways (Eastern Region). The lines through Hackney were electrified in the late 1950s with electric services commencing operation on 21 November 1960. The original 1872 signal box was replaced by a new signal box located on platforms 2 and 3 in May of the same year. The ticket hall was rebuilt in the early 1980s along with changes to the roofs on the platforms. The island platform's wooden roof was replaced with steel sheeting on the existing frames whilst the side platforms were left unaltered other than the removal of their "dog-tooth" fascia boards. To coincide with the closure of Broad Street station in 1986 a new line linking the North London Line to the Slow Lines just south of Hackney Downs was opened to allow operation of Watford - Liverpool Street services. This occupied the site of the former Graham Road GER goods depot which was accessed from the North London line. Passenger services ceased circa 1992 although empty stock trains have used it since. The line is little used in 2017. The privatisation era (1994-present day) The signal box, installed in 1960 when the line was electrified, closed in May 2001 when signalling on the line was centralised at Liverpool Street. Ticket barriers were installed in 2011. A pedestrian link between Hackney Downs and Hackney Central stations was opened in 2015 by London Overground Rail Operations. Until Hackney Central's closure in 1944, a passenger connection had linked the two stations. However, when Hackney Central re-opened in 1985, the footway was not reinstated and passengers transferring between the two stations were obliged to leave one and walk along the street to the other, until the link was rebuilt. The Lea Valley Lines were previously operated by Abellio Greater Anglia as part of the East Anglia franchise. In 2015 they transferred to London Overground operation. Some West Anglia Main Line services continue to call at Hackney Downs. Services The typical off-peak service of trains per hour (tph) is as follows: