What cookies are
Cookies are small text files that a website asks your browser to store on your device. They’re used for things like remembering preferences, keeping you logged in, or tracking how people use a site. Some cookies are essential for a site to work; many others exist only to profile visitors.
Cookie categories we use
We group cookies into two categories: essential (needed for the site to work at a basic level) and analytics (only loaded if you accept them).
Essential
These are always set. They do not track you across other websites.
| Name | Set by | Purpose | Retention |
|---|---|---|---|
nexsys-cookie-consent | This site (localStorage) | Remembers whether you accepted or declined analytics so we don’t show the banner every visit. | Until you clear it from your browser, or you click “Manage cookies” below. |
Analytics
These only load after you click “Accept” in the cookie banner. We use them to understand which pages people find useful and to spot parts of the site that frustrate visitors — nothing is used to target advertising.
| Name | Set by | Purpose | Retention |
|---|---|---|---|
_ga | Google Analytics 4 (Google LLC) | Distinguishes unique visitors so aggregate traffic can be counted. | 2 years |
_ga_<container-id> | Google Analytics 4 | Holds session state for a specific Google Analytics property. | 2 years |
_clck | Microsoft Clarity (Microsoft Corporation) | Persistent Clarity visitor ID linking sessions on this site. | 1 year |
_clsk | Microsoft Clarity | Current Clarity session identifier, used to group page views into sessions. | 1 day |
MUID | Microsoft Clarity (.clarity.ms) | Microsoft shared anonymous identifier used by Clarity; same cookie used by Bing. | Up to 1 year |
ANONCHK, SM | Microsoft Clarity | Short-lived session and synchronisation cookies used by Clarity. | Session – 10 minutes |
Google and Microsoft may update the cookies their products set from time to time. Their current lists are at business.safety.google/adscookies and learn.microsoft.com/clarity/cookie-list.
What Google Analytics and Clarity do
- Google Analytics 4 tells us how many people visit the site, which pages they read, roughly where they come from (country / region), and whether they arrived from a search engine, social link or direct visit. Google Analytics 4 does not log or store IP addresses, and we do not enable Google Signals or advertising personalisation — so the data isn’t used to build advertising profiles.
- Microsoft Clarity records aggregated heatmaps and session replays (recordings of clicks, taps, scrolling and mouse movement) so we can see where visitors click, how far they scroll and where layouts confuse them. It does not capture what you type: we configure Clarity to mask form fields and other sensitive content by default, so your name, email and message are not recorded.
Both services process data on our behalf as processors (and, for Clarity, Microsoft may also act as a controller). Data may be transferred to servers outside the UK/EEA under standard contractual clauses and the UK Addendum. You can withdraw consent at any time using “Manage cookies” below; see also our privacy policy.
Managing your choice
Click “Manage cookies” below at any time to reopen the banner and change your decision. Declining (or clearing your consent) stops the analytics scripts loading on your next visit; cookies already set by Google or Microsoft will expire naturally or can be cleared from your browser.
How to control cookies
You can control cookies and local storage in a few ways:
- Clear our consent entry — open your browser’s dev tools,
go to the “Application” or “Storage” tab, and delete the
nexsys-cookie-consententry under Local Storage for this site. The banner will reappear next visit. - Clear all site data for this site — most browsers let you do this from the address bar’s site-info panel (the padlock icon).
- Block all cookies — you can block cookies and local storage entirely from your browser’s privacy settings. The site will still work, you’ll just see the cookie notice on every visit.
Changes to this policy
We’ll update this page if we add or remove cookies. Material changes will be highlighted by resetting the banner so you can review your choice.
Contact
Questions about cookies or privacy? See our privacy policy or get in touch via the contact page.