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When will second day of London Tube strikes take place this week and which lines are affected?

Published June 2, 2026 · Updated June 2, 2026 · By Joseph Moore

When will second day of London Tube strikes take place this week?

When will second day of London - London commuters are preparing for the second day of upcoming Tube strikes, which are set for Thursday, 21 May. This action follows the first strike on Tuesday, 19 May, as rail workers from the Rail, Maritime and Transport union (RMT) push for changes to working hours and the introduction of a four-day workweek. The strike dates have been confirmed after negotiations on Monday failed, leaving TfL and the RMT in a stalemate over staff conditions. The second strike will affect several key lines, disrupting travel for thousands across the city and prompting concerns about the reliability of the transport network during the week.

Strike Timeline and Key Lines Affected

The second strike, scheduled for Thursday, 21 May, will occur in addition to the first one on Tuesday. These 24-hour walkouts are expected to cause significant delays and cancellations on the Central Line, Northern Line, and Bakerloo Line, which are heavily used for daily commutes. TfL has warned that the impact will be most severe during peak hours, as these lines carry the majority of passengers during the morning and evening rush. The union has not yet released a detailed list of affected stations, but previous strikes have seen disruptions across central London, including major hubs like King's Cross and Oxford Circus.

The RMT has been advocating for a four-day workweek to address staff fatigue and improve work-life balance, arguing that the current schedule leads to increased safety risks in critical roles. TfL, on the other hand, has supported the change as a way to align its operations with other train companies and reduce costs. The union’s decision to proceed with the second strike was made after the cancellation of earlier planned actions on June 16 and 18, which were postponed due to unresolved disputes. This move signals a shift in the union’s strategy, with strikes now scheduled earlier in the year rather than later.

Union and TfL Dispute Over Working Conditions

"We still believe that the points they have raised can be worked out in time, through more detailed discussions, and we are continuing to talk to the union’s representatives to find a way to avoid disruption to London," said Claire Mann, Transport for London’s chief operating officer.

Mann emphasized that the four-day working week proposal allows TfL to offer train operators an extra day off without reducing service quality. She also pointed out that the changes are voluntary, enabling staff to choose between a five-day or four-day schedule. However, the RMT has remained firm in its demands, stating that the proposal does not adequately address concerns about extended shifts and reduced flexibility. A union spokesperson added: "Our members have raised serious concerns around fatigue, longer shifts, reduced flexibility, and the impact these proposals could have in a safety-critical role."

The dispute has been ongoing for months, with the RMT highlighting that the proposed four-day week could lead to staff burnout and increased error rates during operations. TfL has countered by stating that the changes are necessary to modernize the system and reduce operational costs. The strike dates have been pushed forward, with the union now planning actions on June 2 and 4 instead of the originally scheduled June 16 and 18. This shift may be a response to TfL’s reluctance to agree to the union’s terms, escalating tensions ahead of the upcoming strike days.

As the second day of the London Tube strikes approaches, commuters are being urged to plan for potential disruptions. TfL has advised passengers to use alternative transport methods, such as buses and the London Overground, to mitigate the impact of the strikes. The union has also called for greater support from the government, suggesting that the current arrangement puts workers in a difficult position. With the second strike on Thursday, the situation remains critical, and the outcome of the dispute will depend on whether a compromise can be reached before the action begins.

Transport officials are closely monitoring the situation to ensure that services can be maintained as much as possible during the strikes. They have also emphasized the importance of passenger safety, noting that the four-day week proposal includes measures to prevent staff shortages. However, the RMT has warned that these efforts may not be sufficient, and that the strikes are a necessary step to secure better working conditions. The debate over the four-day workweek is likely to continue, with both sides preparing for further negotiations in the coming days.