Piccadilly Line Closures Disrupt Heathrow Journeys

UK: Piccadilly line closures are affecting journeys across London on 11 non-consecutive days through August 27, including a weekend suspension of direct Tube service to Heathrow Airport.

Piccadilly line closures: dates and passenger impact

Transport for London’s confirmed schedule shows that the first block began on July 30. On July 30–31 and Monday, August 3, no Piccadilly line trains run between Cockfosters and Uxbridge. During daytime on July 31, however, trains continue between Acton Town and all Heathrow terminals.

The entire line’s Friday Night Tube is suspended from July 31 into August 1. On Saturday and Sunday, August 1–2, the closed section extends from Cockfosters to Heathrow and includes Saturday Night Tube, removing direct Piccadilly line service to the airport.

Two further three-day closures between Cockfosters and Uxbridge are planned for August 18–20 and August 25–27. These periods bring the total to 11 affected calendar days, but most are partial closures rather than a continuous, line-wide shutdown.

The Metropolitan line will continue to run between Rayners Lane and Uxbridge. Replacement buses cover Acton Town–Rayners Lane, Arnos Grove–Cockfosters and Finsbury Park–Arnos Grove during the July 30–31 closure. Travellers heading to Heathrow during the August 1–2 closure can use the Elizabeth line, which normally runs six airport trains per hour. TfL advises passengers to check real-time information and allow extra time.

Upgrades combine infrastructure work with train testing

The closures give engineers access to the power supply, tracks, signalling, platforms, depots and sidings. TfL says work has already been completed at 119 Piccadilly line platforms to accommodate trains that are longer than the existing fleet and have different door positions. A fully loaded 68-tonne test train also covered 400 km during earlier testing.

The work forms part of the £3.4 billion Piccadilly line upgrade, which covers both rolling stock and infrastructure.

Don’t miss…Brenner Base Tunnel Bores Break Through Austria–Italy Border

First new trains are due from December 2026

Siemens Mobility is supplying 94 trains to replace 86 units that have served the line since 1975. TfL expects the first new trains to enter passenger service between December 2026 and June 2027, followed by a phased rollout.

Features include walk-through interiors, air-conditioning for the first time on a deep-level Tube train, wider double doors, digital information displays, improved accessibility and onboard CCTV. Each train is designed to provide 10% more capacity while using 20% less energy.

Once all 94 trains are operating, TfL plans to raise central London frequency from 24 to 27 trains per hour, increasing peak capacity by 23%. More planned closures from September through November will support the remaining work, so passengers should recheck the official schedule before travelling.