Piccadilly Line delays and early Saturday closure — Heathrow travellers take note
18 July 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
The Piccadilly Line is facing disruption on two fronts today, with both a live signal fault and a scheduled early-hours closure affecting services through west London.
Severe delays are in place between Acton Town and Heathrow Airport, and between Arnos Grove and Cockfosters, following a signal failure at South Ealing. That stretch through Acton Town sits directly on the route used by many Chiswick residents heading to Heathrow. TfL confirmed that tickets are being accepted on London Buses and the Elizabeth Line while repairs continue. TfL status
Separately, a planned engineering closure means no Piccadilly Line service between Hyde Park Corner and Cockfosters between 00:30 and 04:00 on Saturday 18 July. Replacement buses are operating on that section during those hours. TfL status
If you are travelling to Heathrow today, the Elizabeth Line from Ealing Broadway remains the most reliable alternative. Allow extra time and check live updates before departing.