cookies & tracking.

Cookies are small text files a website saves in your browser. They help the site remember things between page views — for example, that you accepted the privacy banner, or whether you prefer dark mode. UK law (the Privacy and Electronic Communications Regulations, alongside UK GDPR) requires consent before non-essential cookies are set.

Three categories. Strictly necessary cookies set themselves regardless of consent because the site can’t function without them. Analytics cookies only load if you’ve accepted analytics in the consent banner. We don’t use any marketing or advertising cookies.

strictly necessary.

cookieyes-consent — set by the CookieYes consent banner. Stores your choice (accepted / rejected / partial) so the banner doesn’t reappear every page view. Lifetime: 1 year. First-party.

analytics (opt-in only).

These only load if you accept analytics in the consent banner. By default everyone arrives with analytics consent denied — Google Analytics still pings cookieless / modelled data so we can see overall traffic volume, but no individual cookies are set in your browser unless you opt in.

_ga, _ga_T39HBGDBDQ — set by Google Analytics 4. Identify a unique browser session and group page views into sessions. We use them to understand which content is most useful (e.g. which case studies people read). Lifetime: 2 years. Provider: Google. Google’s privacy policy.

_clck, _clsk, MUID, CLID — set by Microsoft Clarity. We use Clarity occasionally to record anonymous session replays so we can see where the site’s confusing or where forms break. Recordings are heavily masked (typed text, sensitive form fields are blurred by default). Lifetimes: 1 day to 1 year. Provider: Microsoft. Microsoft’s privacy statement.

marketing / advertising.

None. We don’t use Facebook Pixel, LinkedIn Insight Tag, TikTok Pixel, Google Ads remarketing, or any other advertising tracker. We don’t sell or share data with ad networks.

The site uses your browser’s localStorage for two preferences: your chosen language (English / Cymraeg) and dark / light theme. These aren’t cookies, never travel back to our server, and don’t identify you. They sit on your device and disappear if you clear your browser data.

You can change your consent at any time. The CookieYes banner has a small floating button at the bottom-left of the page that re-opens the consent panel. You can also clear cookies from your browser settings to reset your choice — the banner will reappear on your next visit.

Browser-by-browser opt-out instructions: Chrome · Safari · Firefox · Edge.

This page covers cookies and similar technologies. For the bigger picture — what data we collect when you contact us, how long we keep it, your rights under UK GDPR — see the privacy policy. If you’d like to make a complaint about how we handle your data, the UK Information Commissioner’s Office is the regulator: ico.org.uk.

If we add a new tool that sets cookies, swap providers, or change retention periods, we’ll update this list and the date below. We’ll also re-trigger the consent banner if the change materially affects what we ask consent for.

Last updated: May 2026