After the war, plans to complete the Northern Heights project were reviewed but no work was carried out. Maintenance works and reconstruction of war damage on the existing network had the greatest call on London Underground funds. Funds for new works were severely limited and priority was given to the completion of the western and eastern extensions of the Central line to West Ruislip, Ongar and Hainault. Despite being shown as under construction on underground maps as late as 1950, work never restarted on the unimplemented parts of the Northern Heights project.