How we use cookies

When you browse our website, we collect ‘cookies’ to help us understand more about how our site is used by visitors, and to develop and enhance our services to you.

A ‘cookie’ is a bit of information kept on your computer. It tells us things like what device you’re using and what pages you click on.
We use cookies to:

  • Track aspects of user visits, including the length of a user’s visit, their browser, geographic location and the use of the search facility on this website.
  • Remember users selected contrast and/or text resizing style preferences for this website.

First party cookies used on the Environment Centre’s website

The table below lists the cookies that this website may issue:

CookieWhat it is used forExpires
_gaThese cookies are used for Google Analytics to distinguish unique users by assigning a randomly generated number as a client identifier.2 years
_gidThis cookie is used for Google Analytics to store and update a unique value for each page visited.1 day
1p_JARThis cookie is used for Google Analytics to store and update a unique value for each page visited.7 days
Size, contrastIf you choose to resize the text or enhance the colour contrast on our website, these cookies are used to remember your preferred settings. They allow you to look around our website without having to reset the text size or contrast on each new page you visit. They are session cookies, which means they are removed from your device when you close your browser window. 
identIf you decide to register or login on our website, we will issue this cookie to keep you logged in as you navigate from page to page. 
identuThis cookie makes it easier for you to login on return visits to our website. Your username will automatically appear in the login box and you just need to enter your password to login. 
nf_htmlonlyThis cookie simply stores that a user has given implied consent for the use of cookies and prevents the cookie pop-up message from reappearing. 

Cookies for measuring use for our website

CookieOriginatorWhat it is used forExpires
_utmaGoogle-analytics.comThis cookie keeps track of the number of times a visitor has been to the website, when their first visit was, and when their last visit occurred.2 years from set/update
_utmbThe B and C cookies work together to calculate how long a visit takes. __utmb takes a timestamp of the exact moment in time when a visitor enters a site, while  __utmc takes a timestamp of the exact moment in time when a visitor leaves a site30 minutes from set/update
_utmcWhen the user exits the browser
_utmvThis cookie is used when site owners create custom visitor-level variables for customising what can be measured. The cookie is updated every time data is sent to Google Analytics.0 days
_utmzThis 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. Find out more about Google’s privacy policy180 days months from set/update

Cookies set by a third party

To improve user experience, we allow you to share pages of our website via social networking sites, such as Facebook. We may also display content from other websites, such as YouTube or Google maps, on our web pages. Please note that you may be sent cookies from these other websites. We do not control these cookies and advise you to check the relevant third-party privacy policies to find out more about the cookies they use and how to manage them.

The table below lists the third party cookies (issued by other websites) which appear on the Environment Centre’s website.

CookieOriginatorWhat the cookie is used for (where known)Expires
APISID, HSID, NID, SID, SIDCC, PREF.Google.comThese cookies are various unique identifiers, except for PREF which stores your options such as preferred zoom level.


A unique reference is given to each computer to allow analysis of requests to Google Maps. Data is only used for overall visitor analysis.

730 days
IDEDoubleclick.netUsed by Google DoubleClick to register and report the website user’s actions after viewing or clicking one of the advertiser’s ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.1 year
test_cookieUsed by Google DoubleClick to check if the user’s browser supports cookies.End of session
VISITOR_INFO1_LIVE, LOGIN_INFO, HSID, APISID, SIG, PREFYouTube.comThis cookie is used as a unique identifier to track viewing of videos. There are some third party cookies associated with the Youtube videos which we embed in our site. These cookies are used to remember your previous selections or preferred settings made when looking at information or using a service. Google use information collected from cookies to improve your user experience and the overall quality of their services. For example, by saving your language preferences, Google will be able to provide you with their services in your preferred language.


Read more on YouTube privacy policy –

6 months to 10 years
SERVERID, _cookie_id, qcaSlideshare.netWe use slideshare to share presentations from our events; Slideshare uses the listed session ID cookies to enable certain features of the site, to better understand how you interact with the site and to monitor aggregate usage by visitors and web traffic routing on the site.


Read more on Slideshare privacy policy:

At end of session, twitter.comTwitter does not currently provide information on the use of specific cookies.


Read more on Twitter’s privacy policy:

0 days
personalization_id2 years
k7 days
eu_cn1 year
External_referer7 days
guest_id331 days
remember_checked3254 days
remember_checked_on3254 days
secure_session6906 days
twll3254 days
auth_token6906 days
tfw_exp14 days
pid547 days
lang0 days
datr, locale, reg_fb_gate, reg_fb_refFacebook.comFacebook uses these cookies to enable certain features, and study how visitors use their services.Up to 2 years

How to control and delete cookies

If you don’t want to receive cookies, you can change settings in your web browser so that your browser tells you when cookies are sent to it or you can refuse cookies altogether. You can also delete cookies that have already been set.

If you wish to restrict or block web browser cookies, the Help function within your browser should tell you how. Alternatively, these sites can provide more information on how to do this:


This privacy policy only covers this website and its subdomains; other websites linked from this website are not covered by this policy. Once you have accessed another website via one of our links you will be subject to the security and privacy policy of that site.

Get in touch with us about your data

You can contact us at any time and ask us:

  • What information we’ve stored about you
  • To change or update your details
  • To delete your details from our records

Please contact us at

If you want to make a complaint

If you’re not happy with how we’ve handled your data, you can make a complaint.

You can also raise your concern with the Information Commissioner’s Office.