Please can I request the following: 1. The total time (in days, hours, and minutes) for which each individual tube line was part suspended for planned engineering works between (and including) 00.00 on 1st January 2019 and 23.59 on 31st December 2019. 2. The total time (in days, hours, and minutes) for which each individual tube line was fully suspended for planned engineering works between (and including) 00.00 on 1st January 2019 and 23.59 on 31st December 2019.

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TfL Ref: FOI-3324-1920

Thank you for your request received by Transport for London (TfL) on 30^th January 2020 asking for information about line suspensions on the London Underground.

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

Specifically you asked:

“Please can I request the following:

1. The total time (in days, hours, and minutes) for which each individual tube line was part suspended for planned engineering works between (and including) 00.00 on 1st January 2019 and 23.59 on 31st December 2019.

2. The total time (in days, hours, and minutes) for which each individual tube line was fully suspended for planned engineering works between (and including) 00.00 on 1st January 2019 and 23.59 on 31st December 2019.”

I can confirm that we hold the information you require. However, it is estimated that to provide the exact data requested – down to the level of minutes - would exceed the costs threshold for responding to requests of £450, as set out in section 12 of the Freedom of Information Act. Under section 12, a public authority is not obliged to comply with a request if it estimates that the cost of determining whether it holds the requested information, and then locating, retrieving or extracting it from other information, would exceed this limit – calculated at a rate of £25 per hour (equivalent to 18 hours work). We estimate that it would take close to a week (36 hours) to provide the information exactly as requested. However, that said, we can instead provide the information down to the hourly level, as shown in the table below (this is based on the assumption that a full weekend closure lasts for 52 hours and a full one day closure is 27 hours, which is the standard in our planning estimations). Note that the “other” closures columns are those that do not constitute the normal full-weekend of one-day closures – so, for example, Night Tube closures or extended engineering hours.

Closures for engineering works are vital for the maintenance and upgrade of the network. Note that the lines with the highest number of closures shown below are all part of the current “Four Lines Modernisation” project (4LM). This will see obsolete equipment, dating back to the 1920s in some places, replaced with modern, computerised signalling and control systems, as well as a new fleet of air-conditioned trains, faster journeys and reduced waiting times. More information about the project and its benefits can be found on our website here:

https://tfl.gov.uk/travel-information/improvements-and-projects/four-lines-modernisation

London Underground Part-Suspensions / Full-Suspensions by Line 2019:

	Partial closures in hours		Other partial closures	All Partial closures		Full closures in hours		Other full closures	All Full closures
Line	Full Weekend	One day only	Hours	Total hours	Total days	Full Weekend	One day only	Hours	Total Hours	Total days
District	1352	135	16	1503	56	0	0	0	0	0
H&C	364	0	0	364	13	728	108	16	852	32
Circle	572	0	0	572	21	364	108	16	488	18
Metropolitan	676	108	16	800	30	0	0	0	0	0
Victoria	0	27	0	27	1	0	0	0	0	0
Central	260	0	0	260	10	0	0	0	0	0
Jubilee	0	0	12	12	0.4	0	0	0	0	0
Piccadilly	156	0	0	156	6	0	0	8	8	0.3
Bakerloo	0	27	0	27	1	52	27	0	79	3
Northern	0	27	0	27	1	0	0	0	0	0
W&C	0	0	0	0	0	0	0	0	0	0

A summary of current planned engineering works can be accessed via the following links:

Planned line closures: https://tfl.gov.uk/status-updates/planned-track-closures

Planned works: https://tfl.gov.uk/status-updates/planned-works-calendar

If this is not the information you are looking for 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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