Cookie Policy
Last reviewed: 14 September 2026
Last updated: 14 September 2026
1. What cookies are
Cookies are small text files a website stores on your device. Similar technologies — local storage, pixels and device fingerprinting — do much the same job, and everything in this policy applies to those too.
2. Our approach
No analytics or advertising cookies are set until you tell us it is okay. Consent is collected through Google's Consent Management Platform, which is certified by Google and built on the IAB Transparency and Consent Framework. Until you make a choice, we apply Google Consent Mode v2 with every non-essential category set to denied, so measurement and advertising storage stay switched off.
Declining costs you nothing — the calculator works exactly the same either way.
3. Strictly necessary
These are needed for the site to work and are set without consent, as UK law permits.
| What | Set by | Purpose | Expires |
|---|---|---|---|
| Consent record | Google CMP | Stores which categories you agreed to, so we do not ask again on every page | Up to 13 months |
4. Analytics — only with your consent
We use Google Analytics 4, delivered through Google Tag Manager, to count visitors and see which features get used.
| Name | Set by | Purpose | Expires |
|---|---|---|---|
| _ga | Google Analytics | Distinguishes one visitor from another using a randomly generated ID | 2 years |
| _ga_<container> | Google Analytics | Maintains session state so a visit is not counted twice | 2 years |
5. Advertising — only with your consent
This site is funded by advertising. We use Google AdSense, which sets cookies to measure ad performance, limit how often you see the same ad, and — if you agree to personalised advertising — select ads based on your interests.
| Name | Set by | Purpose | Expires |
|---|---|---|---|
| __gads / __gpi | Google AdSense | Measures ad interactions and limits repeat ads | Up to 13 months |
| IDE / test_cookie | Google DoubleClick | Measures ad effectiveness and, with consent, personalises ads | Up to 13 months |
If you decline advertising cookies you will still see ads, but they will be non-personalised — selected from the page content and your general location rather than your browsing history. Google publishes the full list of cookies it uses for advertising in its advertising cookie notice.
6. Changing your mind
You can change or withdraw your choice at any time, and it is exactly as easy as giving it. Use the Cookie settings link at the bottom of any page to reopen the consent dialog. You can also clear this site's cookies in your browser and reload the page to be asked again.
7. Controlling cookies in your browser
Every major browser lets you block or delete cookies, under Settings → Privacy. Blocking all cookies will not break this calculator, though it does mean you will see the consent dialog on every visit.
8. A note on UK law
Since 5 February 2026, the Data (Use and Access) Act 2025 has allowed some purely statistical, first-party analytics to run without prior consent, provided visitors are told clearly and can object. That exception is narrow, and a standard Google Analytics 4 setup does not fall within it — so we ask for your consent instead.
9. Questions
See our Privacy Policy for the full picture, or email nouvelledigitaladmin@gmail.com.