Cookie Policy

1.1 Introduction

This policy describes the use of ‘cookies’ on this website. This policy applies to only the Polis website (i.e. and subpages): if you navigate away from the site this policy no longer applies.

This policy was last updated on: 29 May 2018

1.2 The Key Information (Briefly)

This website sets a first-party session cookie (types of cookie are explained below). This is essential to allow users to log in to the site. This website also sets a number of third-party persistent cookies. These are used by other services, such as those from Google and Twitter, for analytics and other purposes (including advertising). You can see a list of these below. You should check the privacy policies of these services for further information.

You can block cookies by adjusting your browser’s settings (see instructions below). Blocking third-party cookies will not affect the working of the website. If you block all cookies – including first-party cookies – you may not be able to log in to your account.

1.3 What are Cookies?

A cookie is a small file that is stored on your device (in the browser, e.g. Chrome, Safari, Firefox, etc.) when you visit a website. Cookies typically contain information that is used by that website – and possibly others – to keep track of your activity on the site. For example, a cookie could be used to enable a site to remember and display your logon ID the next time you visit it (so you don’t have to type it in again); or a cookie could be used to track your browsing preferences across different sites in order to target specific adverts towards you.

There are different kinds of cookies for different purposes. To understand this policy, you should be aware of the following.

  • First-party cookies: These are set by the website you are visiting. First-party cookies typically contain information about your preferences or interaction with that website.
  • Third-party cookies: These are set by (or will be sent to) a website other than the one you are visiting. Third-party cookies are sometimes used for advertising purposes or for tracking users’ browsing habits.
  • Session cookies: These are cookies that are stored on your device but deleted when you end your browsing session (i.e. when you close your browser window).
  • Persistent cookies: These are cookies that remain on your device even after you close your browser. They can be stored on your device for any period of time.

1.4 What Cookies are set by this Website? FIRST-PARTY COOKIES





What does it do?



No: expires at the end of your browsing session.

This cookie is essential for enabling users to log in to the site.





What does it do?



Yes: these cookies persist for at least a month and in some cases up to 10 years.

These cookies are used by Google services to store user preferences and information to customise your experience (including ads) on Google sites (e.g. YouTube).

__utma, __utmz



Yes: these cookies last for between 6 months and 2 years by default

This cookie is set by the Google Analytics service which enables website owners to track visitor behaviour and measure site performance.

Bku, loc, mus, na_id, na_tc, ssc, uid, uvc, atuvc


Yes: these cookies persist for 2 years

These cookies are for analytics and are set by the social sharing platform AddThis.

_twitter_sess, auth_token, csrf_same_site, csrf_same_site_set, ct0, external_referer, guest_id, ktd, lang, personalization-_idremember, _checked_on, syndication_-guest_id, tfw_exp, twid,


Yes: they may never expire.

These cookies are used by Twitter services to monitor referral links, and login information. They remember information about your browser and your preferences and

help Twitter improve and understand how people use their services.

1.5 Managing Cookies on your Device

You can easily adjust the settings of your browser to control what cookies you want to accept and which to reject. You can also delete any cookies that may already be stored. The options for managing cookies can usually be found in the “settings” section of your browser. If you cannot find the relevant settings, try looking up “Cookie settings for …” (and replace the ‘…’ with the name of your browser to find instructions on a search engine. We remind you that the Polis website should function completely normally, with full functionality if you set your browser to block third-party cookies. However, if you block the essential first-party cookie, you may have trouble in logging in to the site.

1.6 Good Faith

We do our best to ensure that this site meets your expectations. If you have any comments or concerns about cookies on the Polis website, please contact Alexia Collignon (