Cookie Policy

Last updated: April 2026

What are cookies?

Small text files stored on your device when you visit a website. They help remember preferences and measure usage.

Cookies and storage we use

Strictly necessary (no consent required):

• hfi_theme — your chosen colour theme. localStorage, no expiry.
• hfi_lang — your chosen language. localStorage, no expiry.
• hfi_unit — your chosen speed unit. localStorage, no expiry.
• hfi_cookies — records your cookie consent choice. localStorage, no expiry.

These never leave your device.

Analytics (only if you accept):

• _ga — Google Analytics user identifier. Expires after 2 years.
• _ga_<ID> — Google Analytics 4 session identifier. Expires after 2 years.
• _gid — Google Analytics user identifier. Expires after 24 hours.

Advertising (only if you accept):

• __gads, __gpi — Google AdSense ad measurement and personalisation. Expires after 13 months.
• NID, IDE — Google ad personalisation. Expires after 6-13 months.

Your choices

When you first visit, we ask whether to enable analytics and advertising cookies. We do not load Google Analytics or AdSense at all unless you accept.

You can change your choice at any time by clearing your browser data and reloading the site, or by clicking here to reset preferences.

Managing cookies in your browser

You can also block cookies via your browser settings. You can opt out of Google Analytics specifically using the Google opt-out add-on, and out of personalised Google ads at Google Ads Settings.

Consent Mode v2

This site implements Google's Consent Mode v2. Until you accept, all Google services are signalled to operate in restricted mode (no cookies, no personalisation).