FOI release

Request for II documents: EPR/AP3903PD

This request was refused in part, so we didn't provide some of the information the requester asked for. This may include information where we can neither confirm nor deny that we hold it.

Case reference EIR2025/34923

Received 30 September 2025

Published 5 November 2025

Request

I would like to request the following documents related to the Environmental Permit (Industrial Installations) number EPR/AP3903PD - VIRTUS HOLDCO LIMITED:

• Virtus Data Centres Stockley Park Campus - Air Quality Assessment

• Virtus Data Centres Stockley Park Campus – Addendum Air Quality Assessment: Ammonia

• Virtus Data Centres Stockley Park Campus Air Quality Report – Technical Note 1

Response

Please find the requested permit documents attached to this response. Please note that we have redacted some personal data, see appendix below for more information. 

• Virtus Data Centres Stockley Park Campus - Air Quality Assessment

• Virtus Data Centres Stockley Park Campus – Addendum Air Quality Assessment: Ammonia

• Virtus Data Centres Stockley Park Campus Air Quality Report – Technical Note 1

Please refer to the Open Government Licence which explains the permitted use of this information.

Information Warnings:

(i) Personal Data in the Information is exempt from the Open Government Licence.

(ii) It is the responsibility of the licensee to ensure that data they hold is accurate and up to date.

Appendix  

We are refusing to provide some of the data to prevent identification of the person(s). As this is personal data under the Data Protection Act 2018 (DPA 2018) and to disclose it would breach the First Data Protection Principle of the DPA 2018.  

The information requested is therefore exempt due to Regulation 13(1) of the Environmental Information Regulations 2004, which explains that:

  “To the extent that the information requested includes personal data of which the applicant is not the data subject, a public authority must not disclose the personal data if— (a) the first condition is satisfied…

  ”The ‘first condition’ referred to above is further explained in Regulation 13(2A):

  “The first condition is that the disclosure of the information to a member of the public otherwise than under these Regulations— (a) would contravene any of the data protection principles…

”The First Data Protection Principle” requires that we are fair to individuals when we collect, hold and use their personal data. In this case it would be unfair to disclose information that would identify members of staff as those individuals have a reasonable expectation that such information held by the Environment Agency would remain confidential. 

There is no requirement to conduct a public interest test when refusing information on this ground. 

Documents

• Application Variation - Air Quality Assessment Report 12072022 - Redacted.pdf (15.6 MB)
• Application Variation - 70091579 AQ explanatory addendum - Technical Note 1 - 16082022 - Redacted.pdf (1.2 MB)
• Application Variation - AQA Report Addendum - Ammonia - 26072022 - Redacted.pdf (2.5 MB)

This is Environment Agency's response to a freedom of information (FOI) or environmental information regulations (EIR) request.