War on 3 September 1939, completion of the works on the line was slowed. In order to provide a service to the nearby Inglis Barracks, works continued between Finchley Central and Mill Hill East. The station re-opened with electric Northern line services on 18 May 1941. The planned second platform at Mill Hill East was not built and the service continued to operate over the single track line as before. Post-war 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. British Railways (the successor to the LNER) freight trains continued to serve the station's goods yard until 1 October 1962, when it was closed. The site of the yard is now a business park. As one of two EH&LR stations retaining their original buildings (with Finchley Central), it is one of the oldest parts of the Underground system, pre-dating the first tunnelled section of the Northern line (the City and South London Railway) by more than twenty years. Today Refurbishment of the station was carried out and completed in 2007. The works included structural repairs to the station and platforms, the re-decoration and re-tiling of walls and floors, a new public address system, as well as CCTV cameras and Help Points. The station was made accessible in 2020 by means of a new lift and link bridge, which was prefabricated off site, and craned into position in August 2019. The lift finally opened in February 2020, becoming the Underground's 79th step-free station. Services The station is in Travelcard Zone 4. With million passengers in , it is station on the network. the Northern line service was a shuttle on the single track between Finchley Central and Mill Hill East, with the exception of peak-hour services. Direct weekend trains were discontinued on 20 May 2007. direct peak times trains operated to either Kennington (via Charing Cross) or Morden (via Bank). Train frequencies vary throughout the day, but are