Our Ref:         FOI-1299-1920

Thank you for your request received on 31 July 2019 asking for further information about signal failures 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. I can confirm we do hold the information you require.
 
Please find the requested information below for, please note that there are a few small changes in the numbers from our original response as the data has since been updated:
 
Year Name Number of Signals Incidents Average of Initial Delay (Minutes)
2010-11 2,553  13.3
2011-12 3,111  13.0
2012-13 2,629  11.6
2013-14 2,239  12.2
2014-15 2,220  13.3
2015-16 1,723  11.9
2016-17 1,876  14.1
2017-18 1,992  12.4
2018-19 1,706  16.3
2019-20 (Until P3) 326  15.0
 
Line Number of Signals Incidents  Average of Initial Delay (Minutes)
Bakerloo 744  12.0
C&H 1,474  14.4
Central 2,570  9.4
District 4,014  14.5
Jubilee 3,991  9.7
Metropolitan 2,753  17.2
Northern 1,345  12.3
Piccadilly 2,402  14.8
Victoria 855  9.1
Waterloo & City 227  34.2
Total 20,375  13.1

Please note that both tables cover the same time period.

As previously advised, as part of our recent organisational change, a team whose sole focus is working on signalling issues has been created. We will continue to work on maintenance across many different aspects of ensuring reliability on the network, but this team will work to drive reliability and make sure that our customers’ priorities are at the forefront of all work we undertake to improve and maintain signals. We have continued to push for a reduction in ‘Service Affecting Faults’ across the signalling system and last year reduced the amount of signal failures by 12.9 per cent.
 
More information about signaling and signal failures on the London Underground can be found on our website here:
 
https://tfl.gov.uk/campaign/tube-improvements/behind-the-scenes/signalling#on-this-page-1
 
If this is not the information you are looking for please feel free to contact me.
 
Please see the attached information sheet for details of your right to appeal.

Yours sincerely

Gemma Jacob
Senior FOI Case Officer
FOI Case Management Team
General Counsel
Transport for London

[email protected]