F/on from FOI-2522-1920 Thank you for your response. I note that the data you have provided excludes industrial action however I require information related to all closures. Please could you provide the closures caused by industrial action using the same format as previously used (preferably on a new spreadsheet however it isn't essential that it is such) Additionally, could you also provide me with the definitions used for the terms ypu list under the "cause" column of the data provided. I note that these categories are often broad or a "best fit" selection but would be highly appreciative of some approximate "key" or definition list used to determine appropriate selections. For context on why this data is needed. I am conducting a big data analytics thesis and I am looking to incorporate London transport data as a variable, as such, as complete a data set as possible is desired to aid analysis of station impact.

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TfL Ref: FOI-2711-1920

Thank you for your further request received by Transport for London (TfL) on 4^th December 2019 asking for information about London Underground station closures.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy.

I can confirm that we hold the information you require, which can be found in the attached spreadsheet (you may need to expand the width of some columns to see the data in full). Note that while this spreadsheet provides the additional information requested in relation to station closures due to industrial action, it relates to those instances of localised rather than network-wide industrial action. However, for a list of all industrial action on the TfL network please see the previous FOI response here:

https://tfl.gov.uk/corporate/transparency/freedom-of-information/foi-request-detail?referenceId=FOI-1091-1920

Note also that the definitions of causes referred to in this and your previous case are as follows:

- Customer Service - Incident cause due to customer

- Line Operations - Incident cause due to train staff

- Fleet - Incident cause due to rolling stock

- Signals - Incident cause due to signalling asset

- Track - Incident cause due to track asset

- Stations - Incident cause due to stations asset

- Power - Incident cause due to power issue

- Four Lines Modernisation - Incident cause due to Four Lines Modernisation project

- Renewals & Enhancements Projects - Incident cause due to Renewals & Enhancement project

- Industrial Action - Incident cause due to industrial action

- Other - Incident cause due to all other issues e.g. National Rail, Adverse Weather etc.

Note that the Tube carries more than a billion passengers each year, with nearly five million journeys each day. To help us meet increasing demand, we are investing into boosting capacity across the Tube network.

The Four Lines Modernisation programme is a £5.4 billion project to modernise the trains, track and signalling on the oldest parts of the Underground – the Circle, District, Hammersmith & City and Metropolitan lines. This work will improve journeys on 40 per cent of the Tube network, and is the largest single upgrade in the history of the Underground. It will result in greater capacity and improved frequency, as well as improved journey times, better reliability and better customer information. Customers have already seen the benefits of brand new walk-through air conditioned trains on this part of the network.

We also plan to replace trains and signaling systems across the four 'Deep Tube' lines - the Piccadilly, Bakerloo, Central and Waterloo & City lines. Our major improvement programme includes new trains for these lines with more capacity and a faster, more frequent service. These trains will also feature air conditioning with walk-through carriages helping to ease extra demand at peak times as well as improved accessibility with step-free access at platform level.

The Central line fleet is undergoing a programme of improvement to ensure that the line can operate with the best possible service until the new trains are introduced. The Central Line Improvement Programme (CLIP) will see motors replaced, accessibility improved and CCTV installed on Central line trains. This will improve reliability and the journeys of thousands of people every day. The project will see trains removed from service, with a new timetable in operation, and will be complete in 2023.

With the projects outlined above, around two-thirds of our lines are being or have been upgraded. We also have a programme of work underway to increase frequencies on upgraded lines even further with new, improved timetables.

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

Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.

Yours sincerely,

David Wells

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

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