Cookie Policy
Last updated: 11 May 2026
Review and update your cookie preferences at any time: no account required.
1. What are cookies?
Cookies are small text files placed on your device when you visit a website. They allow the site to recognise your device on subsequent visits and remember information such as your preferences and session state. Cookies do not contain executable code and cannot access other data on your device.
In addition to cookies, Bloc uses browser local storage to persist consent preferences and UI settings on your device. The same consent rules apply to both.
2. How we use cookies
We use cookies to operate the website securely, provide a consistent experience across visits, and understand how the site is used so we can improve it. We do not use cookies to serve advertising, track you across unrelated websites, or sell your data to any third party.
3. Cookie categories
Strictly Necessary
Always activeRequired for the website and application to function. Without them, core services such as signing in, navigating the app, and maintaining a secure session would not work. These cookies cannot be disabled.
| Cookie name | Purpose | Duration |
|---|---|---|
| bloc_cookie_consent | Stores your cookie consent preferences and version | 1 year |
| next-auth.session-token | Authenticates your signed-in session with Bloc app | Session |
| next-auth.csrf-token | Protects against cross-site request forgery attacks | Session |
| __Secure-next-auth.* | Secure variants of authentication cookies (HTTPS only) | Session |
Functional
OptionalThese cookies allow Bloc to remember your preferences across sessions such as your chosen colour theme. Disabling them will not prevent you from using the site, but some preferences may not persist between visits.
| Storage key | Purpose | Duration |
|---|---|---|
| bloc_theme | Remembers your preferred colour theme (light/dark) | Local storage |
| bloc_ui_prefs | Stores UI preferences such as sidebar state | Local storage |
Analytics
OptionalAnalytics cookies help us understand how visitors interact with Bloc: which pages are popular, where users encounter issues, and how we can improve the product. We use PostHog for product analytics. All data is anonymised and never shared with or sold to third parties.
| Cookie name | Provider | Purpose | Duration |
|---|---|---|---|
| ph_* | PostHog | Identifies anonymous sessions for product analytics. Data is anonymised before processing. | 1 year |
| posthog_session | PostHog | Tracks session boundaries for analytics aggregation | Session |
Marketing
OptionalBloc does not currently run advertising campaigns. This category is reserved for future use. No marketing cookies are active at this time. Should we introduce marketing cookies in the future, we will seek fresh consent before setting them.
4. Your rights and choices
Under the UK GDPR and the Privacy and Electronic Communications Regulations (PECR) you have the right to:
- Give or withhold consent for non-essential cookies using the banner shown on your first visit or the Cookie settings button below.
- Withdraw consent at any time with the same ease with which you gave it: use the "Cookie settings" button in any page footer or visit this page.
- Access clear information about every cookie we use: this policy provides that information.
- Delete cookies at any time through your browser settings. Clearing cookies will also remove your consent record and the banner will reappear on your next visit.
5. How we record consent
When you make a choice about cookies, we store a consent record in your browser's local storage. This record contains the date and time of your choice, the version of this policy in effect at that time, and which categories you accepted or declined. We retain this record to demonstrate compliance with PECR and the UK GDPR.
If we materially update this Cookie Policy, your existing consent record will be invalidated and you will be asked to review and reconfirm your preferences.
6. Third-party services
Some cookies listed above are set by third-party services (currently PostHog). We have Data Processing Agreements in place with each provider. They act as data processors on our behalf and are not permitted to use the data for their own purposes or share it with other parties.
7. Browser controls
Most browsers allow you to view, manage, block, and delete cookies through their settings. Be aware that blocking all cookies will affect the functionality of Bloc and many other websites. For guidance, visit aboutcookies.orgor your browser's official help documentation.
8. Contact us
If you have questions about this Cookie Policy or how we handle your data, please contact our Data Protection team:
Update your cookie preferences
Change your choices at any time: no account required.