This is an HTML version of an attachment to the Freedom of Information request 'List of all light and heavy maintenance depots'.

James Allenden  
Network Rail  
By email: 
Freedom of Information 
The Quadrant  
Elder Gate 
Milton Keynes  
MK9 1EN 
01908 782405 
E xxx@xxxxxxxxxxx.xx.xx 
25 August 2020 
Dear Mr Allenden  
Information request  
Reference number: FOI2020/00856 
Thank you for your email of 27 July 2020, in which you requested the following 
‘’Please would you provide me with a list, including address with postcode of all 
light (maintenance delivery units) and heavy (trains  &OTM) maintenance facilities 
both owned and operated by NR and 3rd party facilities that are involved in 

maintenance of the Railway.’’ 
I have processed your request under the terms of the Freedom of Information Act 2000 
(FOIA) and I can confirm that we hold some of the information you have requested. 
I have consulted with our experts and can advise that we hold the list and postal 
addresses of all Network Rail owned light maintenance depots. However, we are 
withholding this information as we believe that this information about our maintenance 
depots is exempt from disclosure under Section 31(1)(a) of the FOIA. This exemption is 
applicable, where the disclosure would or would be likely to prejudice the prevention or 
detection of crime. In this instance our view is disclosure would be likely to have this effect. 
I will provide further details of this below. 
Please note, we only designate our depots as light, so do not have any ‘heavy 
maintenance facilities’. This is in accordance with the definition in the Railways Act. 
Additionally, we only hold information on light maintenance facilities that are owned by 
Network Rail. We do not hold a list of 3rd party facilities that are in private ownership.  
Network Rail Infrastructure Limited Registered Office: Network Rail, 2nd Floor, One Eversholt Street, London, NW1 2DN Registered in England and Wales No. 2904587 

We have reached this decision as our depot sites are part of the Critical National 
Infrastructure and vital for the operation of the rail network. Within our maintenance 
depots, we have delivery units which enable access to the railway and where we store 
valuable equipment for use in maintenance; we have already experienced a number of 
criminal activities at these units. In consequence, we believe that the disclosure of the 
specific addresses and postcodes would aid criminals in being able to plan more efficiently 
and be more targeted in their actions, as even the names of the individual depots alone 
provides sufficient information for them to be readily located using online maps. 
When assessing the harm that a disclosure would be likely to cause, it is necessary to take 
into account the fact that disclosures made under the FOIA and the EIRs are public 
disclosures which are made to the ‘world at large’; any information disclosed is released 
into the wider public domain rather than simply to the person making the request. 
Because of this, we have to consider the wider impact of making a piece of information 
available to ‘the world’ and whether any individual who might see it could then use the 
information to cause harm.  
Public Interest Test 
This exemption also requires us to consider whether the public interest in disclosure 
outweighs the public interest in maintaining the exemption, or vice versa. There is a 
general presumption in favour of disclosure as providing information relating to our 
activities improves transparency and the accountability of public funds. One of the 
underlying principles of the Act is the need for openness and transparency, and disclosure 
in this case would support this by placing accurate information into the public domain.  
Set against this, however, is an inherent public interest in the prevention of all crimes. In 
this instance, disclosure of this information would be likely to lead to an increase in 
criminal activity at our depot units, as criminals could utilise the location information for 
malicious intent by being more targeted in their approach. It is in the public interest, 
wherever possible, to avoid the drain on public resources. As such, it is sensible to avoid 
creating new vulnerabilities where possible, which would then result in increased costs on 
security and increased burdens on police resources.  
Whilst we recognise the strength of the arguments in favour of disclosure we have 
concluded that the balance of the public interest lies in favour of maintaining the 
exemption and we are therefore withholding the information you have requested under 
Section 31(1)(a) of the FOIA. 
Whilst I could not provide the information on this occasion, I hope this response is helpful 
to explain the reasons why. If you have any enquiries about this response, please contact 
me in the first instance at xxx@xxxxxxxxxxx.xx.xx or on 01908 782405.  Details of your 
appeal rights are below. Please remember to quote the reference number at the top of this 
letter in all future communications. 
Network Rail Infrastructure Limited Registered Office: Network Rail, 2nd Floor, One Eversholt Street, London, NW1 2DN Registered in England and Wales No. 2904587 

Yours sincerely 
Najea Begum 

Information Officer 
The information supplied to you continues to be protected by copyright. You are free to 
use it for your own purposes, including for private study and non-commercial research and 
for any other purpose authorised by an exception in current copyright law. Documents 
(except photographs) can also be used in the UK without requiring permission for the 
purposes of news reporting. Any other re-use, for example commercial publication, would 
require the permission of the copyright holder. Please contact me if you wish to re-use the 
information and need to seek the permission of the copyright holder. 
Appeal rights 
If you are unhappy with the way your request has been handled and wish to make a 
complaint or request a review of our decision, please write to the Head of Freedom of 
Information at Network Rail, Freedom of Information, The Quadrant, Elder Gate, Milton 
Keynes, MK9 1EN, or by email at xxx@xxxxxxxxxxx.xx.xx. Your request must be submitted 
within 40 working days of receipt of this letter.   
If you are not content with the outcome of the internal review, you have the right to apply 
directly to the Information Commissioner for a decision. The Information Commissioner 
(ICO) can be contacted at Information Commissioner's Office, Wycliffe House, Water 
Lane, Wilmslow, Cheshire, SK9 5AF or you can contact the ICO through the 'Make a 
Complaint' section of their website on this link: 
The relevant section to select will be "Official or Public Information".  
Network Rail Infrastructure Limited Registered Office: Network Rail, 2nd Floor, One Eversholt Street, London, NW1 2DN Registered in England and Wales No. 2904587