New DLR trains return to service on Stratford‑Woolwich route
TfL has fixed braking software, completed testing and will start phased re‑introduction of the air‑conditioned fleet
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Reporting is corroborated by two independent outlets and cites named TfL officials and documents.
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Both articles clearly separate fact from comment and provide specific details about the DLR train issue.
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Headlines use mild emphasis, but the articles provide balanced reporting on the DLR train situation.
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Transport for London announced on 29 July 2026 that the first of its 54 brand‑new DLR trains is operating again on the Stratford International to Woolwich Arsenal line. The train had been out of use since November 2025 after engineers identified a braking‑software error that could cause overshoot in wet conditions. Residents of east and south London will now see the air‑conditioned, wheelchair‑friendly units return to regular service.
Why the trains were withdrawn
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Funding from Lime, Forest, and TfL will support the expansion, with Voi expected to join.
The fleet was taken off the network as a precaution when an automated unit overshot a platform during wet weather, according to TfL. The incident was traced to a fault in the braking software that struggled when rail adhesion was low. TfL and the manufacturer, CAF, removed all 54 units while the problem was investigated.
Modifications and testing completed
TfL says engineers have altered the braking system and added equipment to improve wheel‑track grip. A comprehensive testing programme covering a range of operating conditions was then carried out. Stuart Harvey, TfL’s chief capital officer, told the BBC that the modifications are finished and the trains have passed all safety checks.
Bakerloo line trains all now have wheelchair spaces
Transport for London has completed the installation of accessibility features across its entire Bakerloo line fleet.
I apologise for the delay in reintroducing the trains but am pleased this marks an important milestone in delivering a modern new fleet for the DLR.
Stuart Harvey, TfL chief capital officer
Phased re‑introduction plan
TfL will begin adding the refurbished units to the timetable on the Stratford International to Woolwich Arsenal corridor. Additional trains will be introduced gradually, with performance monitored closely. The Mayor of London, Sadiq Khan, said the rollout will improve comfort and capacity for commuters in the Royal Docks and the Isle of Dogs.
Questions this report answers
+Why were the new DLR trains taken out of service?
The trains were withdrawn in November 2025 after an automated unit overshot a platform in wet weather. Engineers linked the incident to a braking‑software fault that performed poorly when rail adhesion was low, prompting a precautionary fleet removal.
+What changes have been made to the trains before they returned?
TfL modified the braking software and installed equipment to increase wheel‑track grip. After the changes, a comprehensive testing programme in varied conditions confirmed the trains meet safety standards, allowing them to re‑enter passenger service.
+When will the new DLR trains start running for passengers?
The first refurbished train began service on 29 July 2026 on the Stratford International to Woolwich Arsenal route. TfL will add further units gradually, monitoring performance as the phased rollout proceeds along that line.
+How many new DLR trains are there in total?
TfL ordered 54 new DLR trains. All units feature air‑conditioning, live travel information, charging points and enhanced accessibility. The fleet will replace the oldest DLR stock as each train is introduced through the controlled rollout.
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