Cookie policy

This website does not store any information that would, on its own, allow us to identify individual users of this service without their permission. Any cookies that may be used by this website are used either just to track the session (visit) or to maintain user preferences or very basic browser information. Your preferences are not shared with any third parties.

This website's use of cookies

A cookie is a small amount of data sent to your computer or mobile phone from a website.

We use cookies in order to improve our services for you and to:

  • Make our website work as you'd expect
  • Save you having to login every time you visit the site
  • Remember your settings during and between visits
  • Improve the speed/security of the site
  • Allow you to share pages with social networks like Facebook
  • Continuously improve our website for you

A cookie is stored on your device's hard drive. Many cookies are automatically deleted after you finish using a website.

Cookies are not programs and do not collect information from your computer.

How to control and delete cookies

This website will not use cookies to collect personally identifiable information about you. However, if you wish to restrict or block the cookies which are set by this website, or indeed any other website, you can do this through your browser settings. The Help function within your browser should tell you how.

Alternatively, you may wish to visit which contains comprehensive information on how to do this on a wide variety of browsers. You will also find details on how to delete cookies from your computer as well as more general information about cookies. For information on how to do this on the browser of your mobile phone you will need to refer to your handset manual.

Please be aware that restricting cookies may stop some things working on this website as intended.

How you can control cookies

You can control and/or delete cookies as you wish – for details, see You can delete all the cookies already on your computer and you can set most browsers to block them being placed. But if you do this, you may have to manually adjust some preferences every time you visit the site.

What we use cookies for

Several cookies are set by our web servers to ensure that your session is maintained for the duration of your visit (until you close your web browser), to help the site remember your settings and preferences (so you don’t have to keep re-entering them whenever you come back to us) and to help us to diagnose and improve the website.  Some browsers (eg Firefox session manager) keep cookies between browser closes.

Like many other websites we use cookies set by Google Analytics. These allow site owners to measure visitor numbers and website usage. Again, these cookies do not identify you personally but simply assist us with trends of web pages being read and influencing new content and improved visitor usability. (The particular cookies used for this are: _utma, _utmb, _utmc, _utmv and _utmz.)

For further details on the cookies set by Google Analytics, please refer to the Google Code website. To opt-out of Google Analytics across all sites that use it, visit

We also use a service called AddThis which also uses cookies in order to collect data, which is not linked to your personally but stored anonymously.  Some of the cookies used by AddThis are stored on AddThis servers rather than ours.  They have a facility for opting out here

The following is a list of commonly used cookies.

Cookie Name

Typical content

Purpose and use

Also used by



This cookie is used to hold the unique session ID (usually a number) which is generated every time our site is visited. This cookie is deleted when you close the browser

Enables the website you are visiting to keep track of your movement from page to page so you don't get asked for the same information you've already given to the site. Webpages have no memories. Without this, a user going from page to page will be treated by the website as a completely new visitor. Cookies allow you to proceed through many pages of a site quickly and easily without having to authenticate or reprocess each new area you visit.


3 weeks


True or false value

Assists the Drupal content management system in providing content appropriately depending on whether the browser has Javascript enabled or not.


End of session


true or false

This aids screenreader accessibility so editors can enter menu item weights


1 year



true or falseRemembers a display preference about toolbar drawer 1 year


This is written by Google Analytics the first time visitor visits the site. Updated with each visit. This cookie is a randomly generated number. No personal information about you, just information about your computer and your browser.

Google Analytics is a web analytics service to evaluate your use of the site and compile reports for us.

All used by Google Analytics (GA)

Google stores the information collected by the cookie on servers in the United States. Google may also transfer this information to third parties where required to do so by law, or where such third parties process the information on Google's behalf. Google will not associate your IP address with any other data held by Google.  By consenting to Google setting these cookies, you consent to the processing of data about you by Google in the manner and for the purposes set out above.

2 years


Session cookie that is update with each page view or event. This cookie is a randomly generated number.

Used to establish and continue a user session with your site

30 mins after the last update/visitor inactivity


The only info in utmc's content is the Domain Hash

Identifies how long a session or visit lasted. It is not overwritten once a session starts, so by looking at the Created timestamp and the current time one can in theory tell how long a visitor has been on a given site.



This cookie stores the type of referral used by the visitor to reach the site. The cookie is updated with each page view info on how the site was reached (e.g. directly or via a link, organic search or paid search).

This cookie is a randomly generated number.

Used to calculate traffic drivers e.g. search engine traffic, ad campaigns and navigation within the site

6 months



AddThis - Used for sharing buttons on our site. They collect certain anonymous information when you visit our website. They have a general opt-out option for all sites that use their widgets to collect data here


2 years