Last updated: 26 May 2026
What Are Cookies?
Cookies are small text files that a website places on your device when you visit it. They are widely used to make websites work properly, to remember preferences, and to provide information to site owners. You can control and delete cookies through your browser settings.
Cookies We Use
We use a small number of strictly necessary cookies that the site needs to work. We also use two optional measurement and advertising tools, Google Analytics and the Meta Pixel, which only load if you click Accept on the cookie banner. If you decline, or have not yet chosen, neither tool runs and no cookies from either are set.
| Cookie Name | Purpose | Duration |
|---|---|---|
PHPSESSID |
Session management. Keeps you logged in and enables forms (including the subscriber registration flow) to work securely. Deleted when you close your browser. | Session |
_csrf |
Security token attached to form submissions to prevent cross-site request forgery attacks. | Session |
_ga, _ga_* |
Set by Google Analytics (GA4) once you have accepted cookies. Used to distinguish unique visitors and aggregate how the site is used. IP addresses are anonymised before storage. | Up to 2 years |
_fbp |
Set by the Meta Pixel (Facebook) once you have accepted cookies. Identifies your browser so that visits to this site can be matched to advertising audiences on Facebook and Instagram for measurement and retargeting. | Up to 3 months |
_fbc |
Set by the Meta Pixel when you arrive from a Facebook or Instagram advert. Stores the click identifier so the visit can be attributed back to the advert. | Up to 2 years |
Measurement and Advertising with Your Consent
We use Google Analytics 4 to understand which pages are popular and how visitors move through the site. IP addresses are anonymised and the data is not used to target advertising.
We use the Meta Pixel, a small piece of code provided by Meta Platforms Inc. (Facebook, Instagram), to measure the performance of our adverts on Facebook and Instagram and to build audiences of people who have visited the site so we can show them further adverts on those platforms. When the Pixel is active it shares with Meta the page you are viewing, your IP address, basic browser information, and the action you took (for example, visiting a page or starting the subscriber registration form). Meta acts as an independent data controller for this data and may combine it with information it already holds about you.
The lawful basis for both tools is your consent. The cookie banner appears on your first visit. Click Accept to allow them, or Decline to keep them off. You can change your mind at any time using the “Manage cookies” link in the footer. See our Privacy Policy for more about the data each tool processes and the third party policies that apply.
What We Do Not Use
We do not use any of the following.
- Cookies that profile you or build a behavioural advertising audience without consent.
- Third party trackers from any provider other than Google Analytics and the Meta Pixel, both of which are listed above and both of which require your consent.
- Tracking that links the same person across multiple devices, beyond whatever Meta and Google operate as part of their own services.
- Any sale of personal data to data brokers.
How to Manage Cookies
You can control and delete cookies through your browser settings. The following links explain how to manage cookies in the most common browsers.
- Google Chrome: Settings, Privacy and security, Cookies and other site data.
- Mozilla Firefox: Settings, Privacy and Security, Cookies and Site Data.
- Apple Safari: Preferences, Privacy, Manage Website Data.
- Microsoft Edge: Settings, Cookies and site permissions.
Please note that blocking strictly necessary cookies will prevent this website from functioning correctly. The subscriber login and registration flow will not work, and you will be unable to submit forms.
Further Information
For more information about cookies and how to manage them, visit the Information Commissioner's Office guidance at ico.org.uk/for-the-public/online/cookies.