Cookie Policy
Last updated: 11 November 2026
This policy explains how Nerdster Ltd uses cookies and similar technologies on nerdster.co.uk, exactly what each choice on our cookie banner does, and how to change your mind.
What are cookies?
Cookies are small text files a website stores on your device. Where this policy says “cookies” it also covers similar technologies — chiefly your browser’s local storage and session storage, which work the same way. We use them for three things: to remember your cookie choice, to measure how the site is used, and — only if you agree — to understand user journeys and measure our advertising.
Your choice, and what each option does
The first time you visit, a banner offers two buttons. Here is precisely what each one means:
- Before you choose — optional analytics, advertising tags and recordings are off. We do not load Google Analytics, Google Ads, Umami, Microsoft Clarity or LinkedIn Insight.
- “Essential only” — keeps those optional tools off. Forms, bookings, requested chat and security features still work. We remember your choice.
- “Accept all” — enables Google Analytics, our self-hosted Umami visit measurement, Google Ads, Microsoft Clarity masked recordings and LinkedIn Insight. These providers receive usage data as described below. Your form answers, contact details and chat text are not sent in our measurement events.
You can change your mind at any time — see Managing your choice.
Our custom events record progress such as viewing prices, starting a form and an accepted enquiry. They do not include field answers, contact details or message text. Private order and administrative pages are excluded from measurement. The family-safety questionnaire is excluded from Clarity recordings.
Cookies and similar technologies we use
Browser storage
| Name | Stored by | Purpose | Retention |
|---|---|---|---|
cookie-consent, cookie-consent-details | This site (local storage) | Remembers whether you accepted or chose essential only | Up to 180 days |
umami.disabled | This site (local storage) | Set when you choose essential only; tells the cookieless analytics to stay off | Until you accept, or clear it |
nd-attr | This site (session storage) | Remembers how you arrived — the page you landed on, the referring site and any campaign or ad-click reference in that address — so that if you send an enquiry we know which listing or advert it came from. Saved only after you accept cookies, with unrelated query strings removed. Included only when you submit a form; cleared if you withdraw consent | Until you close the browser tab |
These are held in your browser’s storage. Campaign references in nd-attr can link an enquiry to an advert. They are saved only after you accept cookies. A temporary nd-measurement-qa flag also distinguishes internal tests from real visits and expires when the test tab closes.
Analytics — measuring how the site is used
| Name | Set by | Purpose | Retention |
|---|---|---|---|
| none (cookieless) | Umami (self-hosted, stats.nerdster.ai) | Cookieless visit and page counts. Only after “Accept all”. | — |
_ga, _ga_2BK0GF397R | Google Analytics 4 | Distinguishes visitors and sessions. Set only after “Accept all”. Google’s tag does not load before consent or under “Essential only”. | ~2 years |
_clck, _clsk | Microsoft Clarity | Session identifiers for heatmaps and session replay. Only after “Accept all”. | ~1 year / 1 day |
Advertising and audiences — only after “Accept all”
| Name | Set by | Purpose | Retention |
|---|---|---|---|
_gcl_au, IDE | Google Ads / DoubleClick | Measures ad conversions and links ad clicks to visits | ~90 days / ~13 months |
bcookie, li_gc, lidc | LinkedIn Insight | Conversion tracking and matched audiences for LinkedIn ads | up to ~1 year |
Clarity advertising storage is disabled in our integration. If you choose “Accept all”, third-party advertising cookies may be set. If you choose “Essential only”, none are set, and the first-party ones our tags set on an earlier visit (_ga, _ga_*, _gcl_*, _clck, _clsk) are expired straight away. Cookies that belong to another site — LinkedIn’s and Microsoft’s advertising cookies — sit on their domains and cannot be removed by ours; they expire on their own schedule, or you can delete them in your browser.
Managing your choice
Use “Cookie settings” in the footer or the button below to reopen the same two choices. Choosing “Essential only” stops measurement, clears campaign attribution and expires the first-party analytics cookies we can access. The page refreshes to remove tools already running, including LinkedIn. Please finish any unsent form before changing this setting. We ask again after 180 days; you can change your choice sooner.
- Block or delete cookies: every major browser lets you block or delete cookies in its privacy settings. Use “Essential only” to turn off all optional measurement, including cookieless Umami.
- If your browser blocks site storage (some private or hardened modes), we cannot remember your choice between pages. Optional tools stay off until you choose “Accept all” on the current page.
Third parties
When you choose “Accept all”, these providers may set cookies and receive data under their own privacy policies. We do not sell your data.
- Google (Analytics & Ads) — policies.google.com/privacy
- Microsoft (Clarity) — privacy.microsoft.com
- LinkedIn — linkedin.com/legal/privacy-policy
Updates
We may update this policy from time to time. Any changes will be posted here with a new revision date above.
Contact
For questions about our use of cookies, contact us at hello@nerdster.co.uk or write to: Nerdster Ltd, 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ.