After the war, the plans to complete the Northern Heights works were reviewed but were not restarted.
Maintenance works and reconstruction of war damage on the existing network had the greatest demand for LPTB 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, Epping and Hainault.

A government-commissioned review of rail transport in the London area produced a report in 1946 that proposed many new lines.
It anticipated that completion of the Northern Heights works would put pressure on the Northern line's capacity and it proposed that a relief line should be considered for one or other of the two branches.
One of these, designated Route 12B, was proposed to run as a tube line in tunnel from Finchley Central to Clapham Junction via Golders Green, St John's Wood, Baker Street, Knightsbridge and Sloane Square.

Despite being shown as under construction on underground maps as late as 1950, work never restarted on the unimplemented parts of the Northern Heights plan.
The proposal for Route 12B was also not developed by the LPTB or its successor organisations.

Before the war, Charles Holden and Reginald Uren designed replacement station buildings to be built on both sides of the road bridge at the north end of the station.
The curtailment of the Northern Heights Plan means that the rebuilding work was not implemented and the station still retains much of its original Victorian architectural character today.
As one of two EH&LR stations retaining its original buildings (the other is Mill Hill East), it is one of the oldest parts of the Underground system, pre-dating the first tunnelled section of the Northern line (the City & South London Railway) by more than twenty years.

British Railways (the successor to the LNER) continued to operate goods trains from Finsbury Park to the station's goods yard until 1 October 1962, when it was closed.
After the war, the plans to complete the Northern Heights works were reviewed but were not restarted. Maintenance works and reconstruction of war damage on the existing network had the greatest demand for LPTB 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, Epping and Hainault.
A government-commissioned review of rail transport in the London area produced a report in 1946 that proposed many new lines. It anticipated that completion of the Northern Heights works would put pressure on the Northern line's capacity and it proposed that a relief line should be considered for one or other of the two branches. One of these, designated Route 12B, was proposed to run as a tube line in tunnel from Finchley Central to Clapham Junction via Golders Green, St John's Wood, Baker Street, Knightsbridge and Sloane Square.
Despite being shown as under construction on underground maps as late as 1950, work never restarted on the unimplemented parts of the Northern Heights plan. The proposal for Route 12B was also not developed by the LPTB or its successor organisations.
Before the war, Charles Holden and Reginald Uren designed replacement station buildings to be built on both sides of the road bridge at the north end of the station. The curtailment of the Northern Heights Plan means that the rebuilding work was not implemented and the station still retains much of its original Victorian architectural character today. As one of two EH&LR stations retaining its original buildings (the other is Mill Hill East), it is one of the oldest parts of the Underground system, pre-dating the first tunnelled section of the Northern line (the City & South London Railway) by more than twenty years.
British Railways (the successor to the LNER) continued to operate goods trains from Finsbury Park to the station's goods yard until 1 October 1962, when it was closed.
Finchley Central tube station