In 1933, Harry Beck's diagrammatic tube map appeared for the first time. On 1 July 1933, the London Passenger Transport Board (LPTB), was created as a public corporation and the Metropolitan, the UERL underground railways, tramway companies and bus operators were merged into one organisation. On the former Metropolitan Railway the Brill Branch closed in 1935, followed by the line from to Verney Junction in 1936. It was proposed to electrify to Amersham with additional tracks from Harrow to Rickmansworth and to extend the Bakerloo line to Stanmore to relieve the bottleneck on the Metropolitan from Baker Street to Finchley. Before any work was started on the Met, the 1935–1940 New Works Programme was announced. This included extending the Central line to Stratford and then onto Epping and Ongar and the Northern line was to be extended north to High Barnet, Alexandra Palace and Bushey Heath and link up with the isolated Great Northern & City Railway, renamed the Northern City Line, which was to be extended beyond Finsbury Park to link up at Highgate.