Sizewell C Cookie Notice

© Copyright 2026 Sizewell C Limited. All rights reserved.

Who we are 

Sizewell C Limited (“we”) are a company which will develop, construct, own, operate, maintain and decommission the nuclear new build power plant at the Sizewell C site in Suffolk. We are a registered private limited company (no. 09284825) and our registered address is at 25 Copthall Avenue, London, England, EC2R 7BP.

This notice applies to any third party who provides information to us. This may include visitors to our sites and contractors working with us, including agency supplied workers, managed service workers and embedded contractors. It does not apply to employees.

We respect your privacy and value the trust you place in us when you share your personal information with us. This notice sets out how we collect and use your personal information, why we use it, with whom we share it, the rights to which you may be entitled and your choices about our use of your personal information, that may arise from your interactions with us.

When consulting the website www.sizewellc.com (hereinafter referred to as “the Website“), certain information relating to your browsing may be recorded in “cookie” files installed on your terminal (computer, tablet, cell phone or any other internet-optimised device).

These cookies are issued by Sizewell C Limited (hereinafter referred to as Sizewell C) in order to facilitate your navigation on this website, for audience measurement purposes and so that you can interact with the social and digital modules on the Website (Facebook, Twitter, etc.).

This Policy allows you to understand what a cookie is, what its role is, and how to configure its operation.

What is a cookie?

A cookie is a text file which, thanks to your browser software, is deposited in a dedicated space on the hard disk of your device when you visit a site or view an advertisement. It contains several data such as the name of the server that deposited it (server of the site you visit), an identifier in the form of a unique number and possibly an expiration date of the cookie.

Cookies allow its issuer to recognise the user’s terminal with which it is registered and to collect information relating to its navigation on the websites.

What type of cookies are issued on this Website?

  • The “cookies” essential to the operation of the Website: they enable the storage of information entered in forms, manage and secure access to reserved areas (registration or access to your account, requested service, etc.).
  • Functional cookies: they allow you to adapt the presentation of the Website to the display preferences of your terminal (language used, display resolution, etc.) and thus personalise your access to the Website.
  • Analytical cookies (or “audience measurement cookies”): they anonymously collect traffic data in order to establish statistics and traffic volumes (number of visits, pages viewed, etc.) and to know the use of the elements that make up this Website (sections and pages consulted, etc.) allowing Sizewell C to monitor and improve the quality of its services. Thus, this Website uses Google Analytics, a web site analysis service provided by Google Inc. (“Google”) which enables us to analyse the use of the Website by its users.
  • Social cookies: they allow you to interact with the social modules on the Website (Facebook, Twitter, etc.).

How long are the cookies stored on your device?

The cookies are stored on your device for as long as it is necessary for the fulfillment of the purposes described above. In particular:

  • Cookies, which require your consent or not, are stored for a maximum of 13 months on your device from their implementation.
  • Information collected via the cookies are kept for 25 months from their implementation/creation on your device.
  • Your choice, both consent and/or refusal, relating to cookies is kept for a period of 6 months (after this period we will ask you again to choose how you wish to manage your cookies on our Website).

Sizewell C Privacy Notice

© Copyright 2026 Sizewell C Limited. All rights reserved. 

When this privacy notice applies

This privacy notice (“Notice”) applies whenever Sizewell C Limited (referred to in this Notice as “Sizewell C”, “we”, “our” or “us”) processes any personal data about visitors to our sites, members of the public, contractors working with or for us (including their employees), as well as employees of public body stakeholders, business partners and supply chain partners (“you” and “your“). In this Notice, “processing” personal data includes, for example, collecting it, using it, storing it or disclosing it to others.

This Notice explains how we collect and use your personal data, why we use it, the circumstances in which we may share it, and your rights in relation to your personal data.

Who we are

We are the company which will develop, construct, own, operate, maintain and decommission a nuclear new build power plant at the Sizewell C site in Suffolk. We are a registered private limited company (no. 09284825) and our registered address is at 25 Copthall Avenue, London, EC2R 7BP.

We are also registered as a data controller with the Information Commissioner’s Office, and our registration number is ZA451467.

Contact us

If you have any questions about this Notice, our processing of your personal data, wish to exercise any of your data protection rights, or otherwise wish to raise a data protection concern with us, please contact our Data Protection Officer by:

  • emailing dpo@sizewellc.com; or
  • writing to “DPO Team” at 25 Copthall Avenue, London, EC2R 7BP.

Keeping your personal data up-to-date

It is important that the personal data we hold about you is accurate and current. Please keep us informed if your personal data changes during your relationship with us.

How is your personal data collected?

We use different methods to collect data from and about you including through:

  • Your interactions with us. You may give us your personal data by filling in online forms or by corresponding with us by post, phone, email or otherwise. This includes personal data you provide when you:
    • subscribe to our service or publications;
    • request marketing to be sent to you;
    • enter a competition, promotion or survey; or
    • give us feedback or contact us.
  • Automated technologies or interactions. As you interact with our website, we will automatically collect Technical Data about your equipment, browsing actions and patterns and personal data such as your IP address. We collect this data by using cookies, server logs and other similar technologies. We may also receive technical data about you if you visit other websites employing our cookies. Please see our cookie policy for further details.
  • Third parties or publicly available sources.We may receive personal data about you from various third parties and public sources.

How we use your personal data

The law requires us to have a legal basis for collecting and using your personal data. We rely on one or more of the following legal bases:

  • Performance of a contract with you: Where we need to perform the contract we are about to enter into or have entered into with you.
  • Legitimate interests: We may use your personal data where it is necessary to conduct our business and pursue our legitimate interests, for example to prevent fraud. We do not use your personal data for activities where our interests are overridden by the impact on you (unless we have your consent or are otherwise required or permitted to by law).
  • Legal obligation: We may use your personal data where it is necessary for compliance with a legal obligation that we are subject to. We will identify the relevant legal obligation when we rely on this legal basis.
  • Consent: We rely on consent only where we have obtained your active agreement to use your personal data for a specified purpose, for example if you subscribe to an email newsletter.

What personal data do we collect, and why?

We have set out below, in a table format, a description of all the ways we plan to use the various categories of your personal data, and which of the legal bases we rely on to do so. We have also identified what our legitimate interests are where appropriate.

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What personal data may we collect? Why? Lawful basis under UK GPDR
Information about employees, site visitors and contractors