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Cookie Policy

Last modifications: June 2018.


What's a cookie?



A cookie is a small file that is downloaded to your browser when you access certain websites. Cookies allow a site to recognize your preferences. This can help us provide you with a more user-friendly navigation experience. For example, cookies allow us to remember your language preferences, so you won't have to remember them each time you visit our website. Each cookie generally contains:


  • The name of the server from which the cookie was sent;
  • The lifetime of the cookie;
  • A value - usually a unique number generated randomly. (The server on the site that sends the cookie uses this number to recognize you when you return to our site or navigate from one page to another.

Strictly Necessary cookies:

These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms.

You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.


Performance cookies:

These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site.

All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site and will not be able to monitor its performance.



What cookies are used on http://www.thg. ? 










Cookie assoiated with sites using CloudFlare, used to speed up page load times. According to CloudFlare it is used to override any security restrictions based on the IP address the visitor is coming from. It does not contain any user identification information.

Strictly Necessary

3 months



This is one of the four main cookies set by the Google Analytics service which enables website owners to track visitor behaviour and measure site performance. This cookie lasts for 2 years by default and distinguishes between users and sessions. It it used to calculate new and returning visitor statistics. The cookie is updated every time data is sent to Google Analytics. The lifespan of the cookie can be customised by website owners.


2 years



This is one of the four main cookies set by the Google Analytics service which enables website owners to track visitor behaviour measure of site performance. This cookie identifies the source of traffic to the site - so Google Analytics can tell site owners where visitors came from when arriving on the site. The cookie has a life span of 6 months and is updated every time data is sent to Google Analytics


6 months



This cookie name is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.


2 years



This cookie name is associated with Google Universal Analytics, according to documentation it is used to throttle the request rate - limiting the collection of data on high traffic sites. It expires after 10 minutes.


10 minutes



This cookie name is asssociated with Google Universal Analytics. This appears to be a new cookie and as of Spring 2017 no information is available from Google. It appears to store and update a unique value for each page visited


1 day



This cookie is set by the cookie compliance solution from OneTrust. It stores information about the categories of cookies the site uses and whether visitors have given or withdrawn consent for the use of each category. This enables site owners to prevent cookies in each category from being set in the users browser, when consent is not given. The cookie has a normal lifespan of one year, so that returning visitors to the site will have their preferences remembered. It contains no information that can identify the site visitor.

Strictly Necessary

1 year



This cookie is set by websites using certain versions of the cookie law compliance solution from OneTrust. It is set after visitors have seen a cookie information notice and in some cases only when they actively close the notice down. It enables the website not to show the message more than once to a user. The cookie has a one year lifespan and contains no personal information.

Strictly Necessary

1 year

Your rights 

You may accept or delete cookies of your choice, with the exception of strictly necessary cookies. You can delete all cookies already stored on your computer and configure most browsers to block them. However, in this case, you may have to specify certain preferences each time you visit a site, and some services and features may not be accessible.


Our preference centre allows you to model the use of cookies on our website as you wish.

To learn more about cookies, you can also visit aboutcookies.org.

For any question regarding the use of cookies on our website we invite you to contact us via This email address is being protected from spambots. You need JavaScript enabled to view it.



More information 

How to exercise your choices, depending on the browser you use?

For the management of cookies and your choices, the configuration of each browser is different. It is described in your browser's help menu, which will let you know how to change your cookie wishes.


For Internet Explorer: http://windows.microsoft.com/fr-FR/windows-vista/Block-or-allow-cookies

For Safari: http://help.apple.com/safari/mac/9.0/#/sfri11471

For Chrome: http://support.google.com/chrome/bin/answer.py?hl=en&hlrm=en&answer=95647

For Firefox : http://support.mozilla.org/fr/kb/Activer%20and%20d%C3%A9sactiver%20les%20cookies

For Opera: http://help.opera.com/Windows/10.20/fr/cookies.html

For other browsers: please refer to your browser's help or go to its editor's site.

Cookie Settings