Transport for London reveals reason for delays to new DLR rolling stock B23, expected to enter service later in 2025

After a long hiatus, the new £942 million Docklands Light Railway rolling stock B23 is finally back in trial service. Transport for London (TfL) has explained the reasons for the delay in response to a Freedom of Information request.

Your exclusive sneak peek of the new DLR trains 👀

Coming soon. Find out more about the new features ⬇️ https://t.co/eYvOKFOfjy pic.twitter.com/DLHxD2aTgt

— TfL (@TfL) September 1, 2025

Request ID: FOI-1452-2526
Date published: 08 September 2025

Transport for London Reveals Delays Rolling Out The New CAF B23 Rolling Stock For The DLR, And Increasing Journey Times

B23 Rolling Stock - © TfL

A Freedom of Information request to Transport for London (TfL) has revealed reasons why the new B23 rolling stock, manufactured by CAF for the Docklands Light Railway, has been delayed instead of Spring 2024, as reported in my previous article early this year.

Request ID: FOI-1926-2425
Date published: 10 October 2024

Details of the challenges faced by TfL as part of the test of the new DLR Rolling Stock

TfL awards contract to CAF to replace old DLR trains

TfL has finally found a manufacturer to build new DLR trains to replace 33 of the old DLR trains manufactured by Bombardier. The manufacturer who won the contract is Construcciones y Auxiliar de Ferrocarriles, S.A (CAF) and they will be building 43 new DLR trains.

Extracts from TfL press release

Customers using the Docklands Light Railway (DLR) will benefit from more frequent and reliable journeys from 2023, after Transport for London (TfL) today announced it has awarded a contract to replace the oldest trains currently serving the railway.