Map Reveals Scrapped Overground Extension Plan for East London
A newly disclosed map has unveiled that Transport for London (TfL) once actively considered extending the London Overground to Thamesmead before ultimately abandoning the project in favor of a Docklands Light Railway (DLR) expansion. The proposed extension would have connected the Suffragette line from Barking Riverside across the River Thames to Thamesmead and Abbey Wood, but was shelved due to higher costs and lower service capacity compared to the DLR alternative.
Details of the Proposed Overground Route
The map, released in response to a Freedom of Information request, illustrates a planned extension along the Thames' northern bank, with twin bored tunnels near Barking Point to cross into Thamesmead. This route was designed to create a new rail link from North to South East London, potentially interchanging with National Rail and Elizabeth line services. However, TfL confirmed that detailed proposals for station locations on the Thamesmead side were never finalized.
Key factors in the decision included:
- The Overground extension would have supported only around four trains per hour, whereas the DLR could offer up to 15 trains per hour during peak times.
- Cost estimates for the Overground project were significantly higher than the £1.7 billion allocated for the DLR extension.
- The DLR option includes a new station at Beckton Riverside, serving 10,000 planned homes, which the Overground would not have reached.
Why TfL Chose the DLR Extension Instead
In a 2024 consultation report, TfL explained that the DLR extension was deemed more effective for supporting new housing developments in Thamesmead, where approximately 15,000 homes are under construction. The waterfront area has been designated as one of seven 'new towns' to spur development. The DLR's higher service frequency and lower cost made it a more attractive option for connecting communities to employment centers and facilitating growth.
Despite this, TfL has noted that the layout at Barking Riverside allows for potential future cross-river expansion, requiring a new sub-surface station to provide clearance for tunnels under the Thames.
Broader Implications for London's Transport Network
This decision aligns with ongoing efforts to optimize London's transport infrastructure. Mayor Sadiq Khan is currently advocating for government funding for the West London Orbital, a proposed Overground line along underused freight routes between Hendon and Hounslow. If insufficient funding is provided, Khan has suggested exploring innovative financing methods, such as levies on residents and businesses, similar to those used for the Northern line extension to Nine Elms and Battersea Power Station.
The shift from the Overground to DLR extension underscores TfL's strategic focus on cost-efficiency and maximizing service benefits to support housing and economic development across the capital.
