Our ref: FOI-3198-2425

Thank you for your request received by Transport for London (TfL) on 06 January 2025 asking for information about the Central line.

Your request has been considered under the requirements of the Freedom of Information Act 2000 and our information access policy. 

I can confirm that we do hold the information you require. You asked:

1.How much of the £500M budget has already been spent on providing the one refurbished tube so far?

The Central Line Improvement Programme (CLIP) is the most significant overhaul project undertaken by TfL engineers in the history of the Tube and will transform journeys for millions of customers every week. The trains on the Central line are more than 30 years old and are among the least reliable on the Tube. The crucial and innovative work done on the CLIP project will install wheelchair bays to improve accessibility, screens in carriages to enhance customer information during travel and new refreshed seating including a new moquette. The project is a new and innovative step for TfL, which has never before undertaken work to install new motors and electrical systems on its trains. Completing the overhaul work will refresh the ageing fleet and ensure that the trains will continue to operate and extend their working life. Two refurbished trains have entered service so far.

£160m has been spent to date on the design, procurement of materials for production and recruitment and training of production staff.

2.How many more trains are planned to be refurbished in 2025?

Three more trains are planned to enter service during 2025.

If you are not satisfied with this response please see the attached information sheet for details of your right to appeal.

Yours sincerely,

Tahsin Prima

FOI Case Officer

General Counsel

Transport for London