TfL Ref: 2709-1920
 
Thank you for your email received by us on 5 December 2019 asking for information about London Underground performance statistics.
Your request has been considered in accordance with the requirements of the Freedom of Information (FOI) Act and our information access policy.  I can confirm we do hold the information you require. You asked for:
 
London Underground performance statistics for (1) the network as a whole, (2) the Metropolitan Line, and (3) the Hammersmith & City Line, in each case for the last 36 months to the latest date for which the information is available, which I trust will be up to the end of the last complete 4-weekly accounting period at the time you send it out (and later if you have it).
 
The performance information I seek relates to train operations and should include failures and delays of whatever category such that the number of delays and impact can be assessed, and be at sufficient detail to determine service miles (or kilometres) lost compared with timetable, Delay length and lost customer hours and so on caused by each failure, and preferably be in a form where comparison with previous years is possible. I imagine you already have spreadsheets containing this very information.
 
I am perfectly happy to accept more detailed information and information about all lines, or for longer periods, if this reduces the effort required at your end to filter this out.
 
The information you asked for is available on our website using the following link to our almanac which provides historical and more recent data to 25 May 2019 at:
 
https://tfl.gov.uk/corporate/publications-and-reports/underground-services-performance
 
In accordance with section 21 of the FOI Act, we are not obliged to supply you with a copy of some of the requested information as it is already accessible to you elsewhere.
 
In accordance with the FOI Act, we are not obliged to supply the remainder of information you are seeking as it is subject to a statutory exemption to the right of access to information, under Section 22 of the Act.
 
In this instance the exemption has been applied as the information you have requested is intended for future publication. It is anticipated that these statistics will be published on our website during Spring 2020.
 
This exemption is subject to a public interest test, which requires us to assess whether the public interest in applying the exemption outweighs the public interest in disclosure. In this instance, it is considered that the public interest favours the publication of this information, in context and according to the pre-determined schedule, rather than in response to your request, to ensure the information is provided accurately and in an accessible manner.
 
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.
 
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
 
 
 
Jasmine Howard
FOI Case Officer
Information Governance
Transport For London