Piccadilly line shuts Cockfosters to Uxbridge for three days from 18 August 2026
Replacement buses run while TfL upgrades tracks for new trains and carries out routine maintenance
Trust 42Craft 55Hype 70How this was reported ▾
Single source, no named official or document cited directly.
How well corroborated and evidenced the reporting is. Higher is better.
No affected passengers or TfL response quoted.
Context, balance and separation of fact from comment. Higher is better.
Headline overstates 'major' closure with no context of scale.
How far presentation runs ahead of substance. Lower is better.
1 source assessed · methodology
Transport for London has closed the Piccadilly line between Cockfosters and Uxbridge from 04:30 on 18 August 2026 until the end of service on 20 August 2026. The closure allows TfL to prepare tracks for the new train fleet and carry out routine maintenance.
Passengers travelling between Cockfosters and Uxbridge must use replacement buses or alternative Tube lines. TfL has advised using the Metropolitan line between Rayners Lane and Uxbridge, and the District line between South Kensington and Ealing Common.
Four Tube lines hit by delays across north and central London
Northern, Piccadilly, District and Metropolitan lines affected during Friday afternoon peak
Replacement buses and alternative routes
Three replacement bus services operate during the closure. The PL4 runs between Acton Town and Rayners Lane, the PL5 between Finchley Central and Cockfosters, and the PL6 between Finsbury Park and Arnos Grove. TfL has urged passengers to allow extra travel time.
Trains continue to run between Acton Town and Heathrow Terminals 1-3, 4 and 5 during the closure. However, further disruption is planned for later in August.
Northern line southbound suspended after incident at Camden Town
TfL advises passengers to use buses or Thameslink while engineers investigate the cause
Further closures planned
The entire Piccadilly line will close for the Friday Night Tube service on 21 August 2026. On 22 August 2026, services between Hyde Park Corner and Acton Town will resume only after 14:00.
Another three-day closure between Cockfosters and Uxbridge is scheduled from 25 to 27 August 2026. TfL said the closures are necessary to ensure the new train fleet can operate safely and reliably.
What happens next
Passengers should check TfL’s website or the TfL Go app for real-time updates before travelling. The next scheduled closure begins on 25 August 2026, with no further closures announced beyond 27 August 2026.
Questions this report answers
+Why is the Piccadilly line closed between Cockfosters and Uxbridge?
Transport for London is closing the Piccadilly line between Cockfosters and Uxbridge to upgrade tracks for the new train fleet and carry out routine maintenance. The closures run from 18 to 20 August 2026, with further closures planned.
+What replacement services are available during the closure?
Three replacement bus services operate: PL4 between Acton Town and Rayners Lane, PL5 between Finchley Central and Cockfosters, and PL6 between Finsbury Park and Arnos Grove. TfL advises allowing extra travel time.
+When will the Piccadilly line reopen after the closures?
Services between Hyde Park Corner and Acton Town resume after 14:00 on 22 August 2026. Another closure between Cockfosters and Uxbridge is planned from 25 to 27 August 2026, with no further closures announced.
+Which alternative Tube lines can I use during the closure?
TfL advises using the Metropolitan line between Rayners Lane and Uxbridge, and the District line between South Kensington and Ealing Common. Trains still run between Acton Town and Heathrow during the closure.
WE FILE
No invented reporter. No hidden source trail.
The London Travel Desk assembled this report from the outlets listed below. Language-model drafting is reviewed under human editorial supervision, with scoring notes and corrections kept visible.
More Coverage in Tube & Rail
Four Tube lines hit by delays across north and central London
Northern line southbound suspended after incident at Camden Town
Elephant & Castle Northern line entrance closes until late September
