 In 1935 the LPTB announced plans as part of its New Works Programme to extend the CLR at both ends by taking over and electrifying local routes owned by the GWR in Middlesex and Buckinghamshire and by the LNER in east London and Essex. Work in the tunnels to lengthen platforms for longer trains and to correct misaligned tunnel sections that slowed running speeds was also carried out. A new station was planned to replace the cramped Wood Lane. The service from North Acton through Greenford and Ruislip to Denham was due to open between January 1940 and March 1941. The eastern extension from Liverpool Street to Stratford, Leyton and Newbury Park and the connection to the LNER lines to Hainault, Epping and Ongar were intended to open in 1940 and 1941. World War II caused works on both extensions to be halted and London Underground services were extended in stages from 1946 to 1949, although the final section from West Ruislip to Denham was cancelled. Following the LPTB take over, the Harry Beck-designed tube map began to show the route's name as the "Central London Line" instead of "Central London Railway". In anticipation of the extensions taking its services far beyond the boundaries of the County of London, "London" was omitted from the name on 23 August 1937; thereafter it was simply the "Central line". The CLR's original tunnels form the core of the Central line's 72.17-kilometre (44.84 mi) route.
