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Southbound Blackwall Tunnel summer closures ahead of Silvertown Tunnel opening next year

Image credit: Transport for London (TfL)

Transport for London (TfL) has confirmed two weekend closures of the southbound Blackwall Tunnel to facilitate the new Silvertown Tunnel opening in 2025.

The closures will occur over the weekends of 20-22 July and 17-19 August. These periods have been selected to avoid major summer events in London. The closures will enable the final road configuration, resurfacing, and safety barrier works.

Silvertown Tunnel plans originated in 2012. Once operational in 2025, it promises to reduce congestion and improve journey times in east London by up to 20 minutes. Additionally, the project will enhance bus services and introduce a cycle shuttle service.

During the closures, southbound traffic will be diverted, while northbound traffic will remain unaffected, being rerouted through the southbound tunnel as necessary. Closures will commence at 00:01 on Saturday and conclude by 05:00 on Monday.

Drivers are urged to plan ahead and consider alternative routes due to expected heavy traffic, particularly around the Rotherhithe Tunnel and A13 Commercial Road. The Woolwich Ferry will operate every fifteen minutes throughout the weekends.

HGV and large van drivers should consider avoiding central London. Additional signage and updates via third-party apps like Waze will inform drivers of the closures.

TfL will also use this opportunity to conduct maintenance within the Blackwall Tunnel to ensure its continued safe operation. For further information, visit

Nick Fairholme, Director of Capital Delivery – Systems at TfL, said: “We are now in the final phase of works to complete the Silvertown Tunnel and these closures will help us to to start to get the tunnel ready to open. We appreciate that these planned weekend works will have an impact on some drivers and are doing everything we can to limit potential disruption - including ensuring a northbound route through the Blackwall Tunnel is maintained throughout.”


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