London Underground and amalgamated with the Morden-Edgware Line. The existing Underground line would be extended north-west from Edgware by 5 kilometres to a new terminus at Bushey Heath and a depot at Aldenham. The extension to Bushey Heath involved three new stations (from south-east to north-west): Much of the land for the railway's alignment had originally been bought by the W&ER in the 19th century, but it had not been able to raise the capital to fund the construction and its power's had expired in 1911. The Underground Group had bought the W&ER in 1922. The Underground's scheme modified the W&ER's plan to connect to the LNER branch by starting the extension from the Morden-Edgware Line station instead. The scheme involved the closure of the LNER station 200 metres south of the Underground station and retained the W&ER's connection to the LNER's single track line from where it passed over the Underground's tracks just to the east of the station and into new platforms to be built in the Underground station. The new link at Edgware and others between LNER and Underground tracks near station and at would have made it theoretically possible to travel south from Edgware to central London via three routes: the existing Underground line to Golders Green, and beyond the former LNER line to and , then the other branch of the Morden-Edgware Line to Camden Town and beyond the former LNER line to Finchley Central, Highgate and then the Northern City Line to and beyond Postponement and cancellation Works to upgrade the existing LNER lines and construction on the new line to Bushey Heath began in the late 1930s but were halted by the outbreak of the Second World War. Additional platforms were started at Edgware and the LNER station and branch line was closed to passenger traffic in 1939 in preparation for the improvements. On the new extension, some earthworks and tunnelling had been undertaken and some structures had been constructed but no further work was done during the war. The Metropolitan Green Belt was introduced to limit the outward expansion of London into the surrounding countryside. The area through which the new Bushey Heath extension was routed was designated as green belt meaning that the planned residential developments were prevented and the need for the stations serving them was removed. Edgware LNER station was never reopened for passengers although freight traffic used the