In 1933, the Underground New Works Programme (1935–1940), to electrify the lines through Finchley, and connect the Northern line from Archway to East Finchley, via a new tunnel was announced. Much of the work was carried out and East Finchley station was rebuilt, but the project was halted by the second world war. All passenger services from Finchley to Edgware ended in September 1939. Nevertheless, Underground trains began running from central London to High Barnet in 1940, and to Mill Hill East, to reach the army barracks, in 1941.