FOI request detail

Jubilee line - trains with mechanical issues

Request ID: FOI-2574-1920
Date published: 13 December 2019

You asked

F/on from FOI-2314 As suggested, please limit the request to cover reports & meeting minutes only to bring the request within a reasonable time frame.

We answered

Our ref: FOI-2574-1920/GH

Thank you for your request received by Transport for London (TfL) on 24 November 2019 asking for information about Jubilee line trains.

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.

On 17 October 2019 our regular safety inspections uncovered an issue on a small number of Jubilee line trains. As a precaution, we removed these trains from service for further detailed inspections to ensure the safety of our customers and staff.

The fault we found involves the fracture of the longitudinal beam which connects the train carriages on the Jubilee line trains.   We have examined all of the Jubilee line trains now and have started to repair those where we have identify these fractures. Over the past month, we have repaired a number of faults on the Jubilee line fleet stock, which has allowed us to improve the service we operate, and we are now running at over 90% capacity.

The root cause has not yet been established as to how this defect occurred: a thorough engineering investigation is underway. At this stage we are therefore unable to answer the second part of your request, asking why there are so many of these faults.

Safety is London Underground’s number one priority. Please be assured that, based on thorough examination by our competent engineers, we can confirm that all Jubilee line trains in service are safe to run.

Please find attached reports and meeting minutes concerning this issue. Please note that in accordance with TfL’s obligations under Data Protection legislation some personal data has been removed from these documents, as required by section 40(2) of the FOI Act. This is because disclosure of this personal data would be a breach of the legislation, specifically the first principle which requires all processing of personal data to be fair and lawful. It would not be fair to disclose this personal information when the individuals have no expectation it would be disclosed and TfL has not satisfied one of the conditions which would make the processing ‘fair’.

A technical maintenance bulletin is also held, but has not been provided to you as it contains detailed photographs and technical information which are subject to statutory exemptions to the right of access to information, under Sections 38(1)(b) and Section 24 of the Act. Disclosure of this information to you has to be regarded as a disclosure to ‘the public at large’. This information could potentially be obtained and utilised by individuals who may have hostile intentions and wish to use this information to cause disruption, commit crimes or breach the security of the London Underground network. The London Underground system is an attractive terrorist target for several reasons. London Underground part of the nation’s critical infrastructure by virtue of its central importance to the functioning of London and its economy. Disclosure of information could compromise security and safety preparedness on London Underground’s network and could place members of the public and TfL staff at risk.

The use of this exemption is subject to an assessment of the public interest in relation to the disclosure of the information concerned. We recognise the need for openness and transparency by public authorities, but in this instance the public interest in applying the exemption, in order to minimise risks to operational resilience, security and safe operation of the London Underground network, the welfare of staff and members of the general public, outweighs the public interest in disclosure.

If this is not the information you are looking for, or if you are unable to access it for some reason, please do not hesitate to contact me.

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

Yours sincerely

Graham Hurt

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London


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