1. CRL Document Number C422-LAO-C-RGN-N105_WS089-5005, dated 14/11/2016. 2. EWN reference 387, dated 12/12/2016 (potentially but not necessarily in Crossrail's Environmental Management System) 3. Document CC1131 issued by WSP (potentially but not necessarily in Crossrail's Environmental Management System) 4. Any documents related to the 22 Great Chapel Street/Hollen Street) entitled Design Risk Management Schedule (potentially but not necessarily in Crossrail's Environmental Management System)

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Our refs: FOI-3124-1920, FOI-3204-1920 & FOI-3235-1920

Thank you for your three requests received by Transport for London (TfL) asking for information about Crossrail.

Your request has been considered under the requirements of the Environmental Information Regulations and our information access policy. I can confirm that we do hold the information you require.

However, given the extent of the information you are looking for, we are applying Regulation 12(4)(b) as we believe that the request is ‘manifestly unreasonable’ because providing the information you have requested would impose unreasonable costs on us and require an unreasonable diversion of resources.

For example, in your request of 16 January you ask for documents under 12 reference numbers. Under number 11, (C422-LAO-A-DDD Series drawings), there are 2215 documents, all of these documents would need to be checked for content and many would require redactions. This alone would be extremely time consuming and would answer only one point of one of your three requests.

We have established that the potentially relevant information which we hold covers a significant period of time and comprises of hundreds of potentially relevant emails, all of which would have to be reviewed, along with many other documents held in various separate storage systems. Information is held by numerous people within TfL, in both electronic and paper files, all of which would have to be manually searched, to some extent at least, to answer your request.

As another example, your request of 13 January, which you subsequently clarified referred to Crossrail, asks for ‘All records of works… in as much detail as this information exists… for a 12 year period, including ‘an exhaustive timeline of all works undertaken on or below the carriageway over this period.’  Searching for and collating this information would again be a huge task.

The use of this exception is subject to a public interest test, which requires us to consider whether the public interest in applying the exception outweighs the public interest in disclosure. We recognise that the release of information would promote accountability and transparency in public services and also help address your particular concerns about this issue. However, the time it would take to provide the information you have requested would divert a disproportionate amount of our resources from its core functions and on balance we consider that the public interest currently favours the use of the exception.

We will consider your request again, if you are able to narrow its scope so that we can more easily locate, retrieve and extract the information you are seeking. If you have specific questions we will be happy to consider those.

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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