London Tube Strikes: RMT vs TfL Four-Day Row, London 2026

Key Points

• RMT union drivers on London Underground plan strikes starting 21 April 2026, opposing a proposed four-day working week with longer shifts.
• Strikes scheduled in 24-hour tranches: 21–22 April and 23–24 April, with further action in May (19–20, 21–22) and June.
• Dispute centres on safety concerns over fatigue from extended shifts; members rejected TfL’s plans.
• TfL expects reduced services on most lines but less severe impact than previous strikes, as ASLEF drivers not striking and non-driver RMT members are working.
• March 2026 strikes (24–27 March) suspended after talks, but April action likely to proceed despite calls for negotiations.
• Around 1,800 RMT drivers are involved; the union claims TfL rejected a £69k pay offer and refuses concessions.
• TfL trialling voluntary four-day week on one line; deems full rollout unaffordable and action “unnecessary”.
• Commuters advised to check travel plans; potential chaos for buses, Elizabeth line, and roads.

London (The Londoner News) April 20, 2026 – London Underground drivers affiliated with the RMT union are poised to launch strike action from noon on Tuesday, 21 April, severely disrupting the capital’s Tube network over four days amid a bitter row over a proposed four-day working week, as confirmed by multiple sources, including The Guardian and TfL. The industrial action, affecting approximately 1,800 drivers, stems from opposition to longer shifts that the union warns could heighten fatigue and compromise safety. Transport for London (TfL) has urged the union to call off the strikes, stating it remains open to talks but views the action as “completely unnecessary”.

What Triggered the London Tube Strikes?

The strikes arise from London Underground’s push for a compressed four-day workweek, which RMT members have overwhelmingly rejected. As reported by Rebecca Speare-Cole of Upday News,

“London Underground drivers will stage six 24-hour strikes over the next three months in a dispute over a proposed four-day working week,”

highlighting concerns over shift lengths. RMT general secretary Eddie Dempsey stated, as quoted in Time Out London,

“There is still time for London Underground to come up with a workable solution but we will take strike action if we cannot get a negotiated settlement.”

The union has raised alarms about driver fatigue and safety risks from extended hours. According to The Guardian’s coverage on 10 March 2026,

“The RMT has raised alarms regarding the duration of shifts, unsatisfactory work arrangements, and the potential ramifications for driver fatigue and safety.”

RMT further claims TfL has “refused to negotiate” despite months of attempts, as noted in Railnews. Conversely, the train drivers’ union Aslef supports the initiative for the extra days off, per People Management.

When Are the Strikes Taking Place?

The action comprises pairs of 24-hour walkouts. UCL News lists the dates as 21–22 April (12:00 Tuesday to 11:59 Wednesday) and 23–24 April (12:00 Thursday to 11:59 Friday), followed by 19–20 May and 21–22 May. Time Out London confirms six strikes across 12 days in April, May, and June 2026, noting March dates were suspended after progress in talks.

TravelTourister adds June 16–18 as newly scheduled, alongside Windrush Line strikes on 23 April. BBC coverage emphasizes the first tranche starts at noon on 21 April, with no last-minute talks expected on 20 April.[ via snippet] TfL’s official page warns of a planned Tube strike from Tuesday 21 to Friday 24 April, urging commuters to plan ahead.

Which Lines and Services Will Be Affected?

TfL anticipates a reduced service across most lines during 21–22 April and 23–24 April, but with less severity than the September 2025 strikes since Aslef drivers and non-driver RMT staff are not walking out. Time Out London reports,

“TfL expects to run a reduced service across most lines,”

though significant disruption remains likely.

Specific routes like the Windrush Line face additional action, per TravelTourister. Buses may see knock-on effects, with Unite balloting closing on 13 April, potentially leading to combined Tube-bus strikes. Elizabeth line and Overground could see surges, echoing past disruptions where public transport usage dropped 20%, as per The Guardian on prior action.

Why Is RMT Opposing the Four-Day Work Week?

RMT argues the model imposes longer shifts, risking safety. As reported by Mick Lynch (implied RMT lead) in BBC articles, the union seeks to avert “significant alterations to work patterns that our members have already rejected,” per Eddie Dempsey in BBC News. The union also cites rejection of a £69k pay offer, as per BBC London on Facebook.

RMT’s stance contrasts with Aslef’s support. People Management notes,

“The proposals are supported by train drivers’ union Associated Society of Locomotive Engineers and Firemen, which backs the extra days off.”

RMT insists on a negotiated settlement, with Dempsey adding,

“We have approached negotiations with TfL in good faith… but TfL seem unwilling to make any concessions,”

according to Time Out.

What Is TfL’s Response to the Strikes?

TfL deems the action “completely unnecessary” and is piloting a voluntary four-day work week on one line. In a 16 April press release, TfL urged,

“TfL is urging the union to call off their action and continue to work together on proposals to pilot a four-day week for train operators.”

Sources told the Evening Standard (via Time Out) that TfL remains open to Monday 20 April meetings, though no formal peace talks are set.

TfL echoes past costs, warning a 32-hour week could exceed £200m annually, diverting funds from improvements, as in prior BBC reports. Mayor Sadiq Khan has not intervened with funding this time, unlike in 2024.

Will the Strikes Be Called Off?

Chances appear slim for April, despite March’s suspension. Time Out questions,

“What are the chances of London Underground strikes being called off?”

noting TfL’s openness but no firm plans. RMT’s Dempsey signals readiness to strike absent concessions. Ongoing negotiations could shift, but sources like The Guardian indicate confirmation of action.

What Does This Mean for Commuters?

Expect severe disruption: reduced Tubes, busier alternatives, and road congestion. TfL advises, “Check before you travel; Use local services which may be busier.” Past strikes cost £230m and dropped ridership 20%, per BBC and The Guardian. Cyclists and walkers surged, as in September 2025 coverage.

Businesses and tourists face chaos, especially on airport links. UCL warns of travel disruptions into May.

Background on Recent TfL Industrial Action

This follows September 2025’s five-day RMT strike over pay and hours, halting most services. Downing Street noted Londoners were “rightly fed up” with TfL’s site crashing. That action ended with TfL rejecting a 32-hour week as £200m-plus costly. March 2026 was averted, but escalation persists.

RMT also mandated no iPad use from 21 March. The pattern underscores chronic tensions over modernization versus worker protections.