Piccadilly Line hit by severe delays after signal failure at Holborn
29 July 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Commuters using the Piccadilly Line faced significant disruption on Tuesday evening after a signal failure at Holborn caused severe delays across the line. The fault affected services in both directions, with knock-on effects for passengers travelling to and from Chiswick's nearest Piccadilly stations at Turnham Green and Gunnersbury.
TfL confirmed that tickets were being accepted as alternatives on the Weaver line, Great Northern, Thameslink and the Elizabeth line during the disruption. Passengers heading into central London from Chiswick may have found the District Line from Gunnersbury, Kew Gardens or Chiswick Park a more reliable option while the fault persisted, though travellers should check current service status before setting out.
This is a separate incident from the Piccadilly Line delays reported earlier in the month between Rayners Lane and Uxbridge. Signal failures at busy central stations such as Holborn can take several hours to resolve fully, so residual delays into the evening are possible.
Up-to-date status for all lines is available on the TfL service status page.