Northern line: Severe Delays on the Due to Signal Failure and Maintenance

Severe Delays Impacting Passengers

“Passengers should anticipate longer journey times and delays at interchange stations,” a spokesperson from Transport for London (TfL) stated regarding the ongoing issues affecting the northern line.

On March 12, 2026, a signal failure at East Finchley compounded existing delays caused by planned maintenance work that has been underway since January 12, 2026. The Bank branch of the northern line has been experiencing early closures from Camden Town to Kennington, further complicating travel for commuters.

Severe delays have been reported between High Barnet and Battersea Power Station, as well as between Mill Hill East and Kennington via Charing Cross. TfL engineers are currently addressing the signal failure at East Finchley, but the duration of the delays remains uncertain.

In light of the disruptions, passengers are advised to check before they travel and allow extra time for their journeys. TfL recommends using its journey planner to check updated routes.

While the northern line faces challenges, normal services have resumed with minor delays on the Bakerloo, Jubilee, and Piccadilly lines, providing some relief to passengers seeking alternative routes.

To assist commuters during this period, London Buses are accepting Tube tickets while engineers work to resolve the issues on the northern line.

As the situation develops, TfL continues to provide updates and encourages passengers to stay informed about their travel options.

Details remain unconfirmed regarding the expected timeline for the resolution of the signal failure and maintenance work, leaving many commuters in a state of uncertainty.