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Cookies

Cookie and tracking notice

Nothing non-essential runs until you say yes. You can change your mind at any time, from any page.

Last updated 18 August 2026

Essential cookies (always on)

These keep the site working: your sign-in session for the participant portal, security and load balancing, and a record of your cookie choice. They cannot be switched off without breaking the portal.

Analytics (off by default)

If you consent, we measure aggregate page usage so we can improve the site. No analytics script loads and no analytics cookie is set unless you opt in. We never combine analytics with your health information.

Advertising and third-party tracking

We do not use advertising cookies, retargeting pixels or cross-site trackers. Given the sensitivity of what people share with us, we do not send any behavioural data to advertising networks.

Change your choice

Your choice is stored on your device and can be changed here at any time.

See also our privacy notice.