Four Tube lines hit by delays across north and central London

Commuters in Barnet faced disruption on 17 August 2026 after Transport for London suspended Northern Line services between Edgware and Golders Green. The closure, which lasted 45 minutes, began at 14:15 and left passengers stranded at stations including Burnt Oak and Colindale.

This Is Local London reported that signal failures also affected three other lines. Piccadilly Line trains experienced delays of up to 20 minutes between Acton Town and Heathrow, while District and Metropolitan lines saw slower services in central London.

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Northern line suspended at Edgware after signal failure

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Barnet services worst affected

The Northern Line suspension forced Barnet residents to seek alternatives. Buses replaced trains between Edgware and Golders Green, with Transport for London warning of longer journey times. Passengers at Burnt Oak station, where the line serves a residential catchment, were advised to use the 204 bus towards Wembley.

A Transport for London spokesperson told This Is Local London that the cause of the Northern Line failure was a trackside equipment fault. Engineers were dispatched to the site, but no estimate for full service resumption was provided. The last update from TfL was issued at 15:30.

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Knock-on delays across network

Signal problems on the Piccadilly Line caused delays of 15 to 20 minutes between Acton Town and Heathrow Terminal 5. This Is Local London noted that the disruption coincided with the start of the school summer holidays, increasing passenger volumes at Heathrow.

District and Metropolitan lines, which share tracks between Aldgate and Tower Hill, also reported slower services. Transport for London did not specify the cause of these delays, but confirmed they were linked to signalling issues near Earl’s Court.

What happens next

Transport for London has not announced when normal service will resume. Passengers are advised to check the TfL website or app for real-time updates. The next scheduled update from TfL is expected by 18:00 on 17 August 2026.

Barnet Council has not issued a statement on the delays. Residents affected by the suspension can submit feedback to Transport for London via its customer service portal or by calling 0343 222 1234.