Cookie Policy



Our website uses cookies to distinguish you from other users of our website. This helps us to provide you with a good experience when you browse our website and also allows us to improve our site. By continuing to browse the site, you are agreeing to our use of cookies.

A cookie is a small file of letters and numbers that we store on your browser or the hard drive of your computer if you agree. Cookies contain information that is transferred to your computer's hard drive.

We use the following cookies:

  • Strictly necessary cookies. These are cookies that are required for the operation of our website. They include, for example, cookies that enable you to log into secure areas of our website, use a shopping cart or make use of e-billing services.
  • Analytical/performance cookies. They allow us to recognise and count the number of visitors and to see how visitors move around our website when they are using it. This helps us to improve the way our website works, for example, by ensuring that users are finding what they are looking for easily.
  • Functionality cookies. These are used to recognise you when you return to our website. This enables us to personalise our content for you, greet you by name and remember your preferences (for example, your choice of language or region).
  • Targeting cookies. These cookies record your visit to our website, the pages you have visited and the links you have followed. We will use this information to make our website and the advertising displayed on it more relevant to your interests. We may also share this information with third parties for this purpose.

You can find more information about the individual cookies we use and the purposes for which we use them for below:

Google Analytics Cookies


  • __utma
  • __utmb
  • __utmc
  • __utmz

These cookies allow us to monitor visitors on our website to improve our experience for everyone.

These cookies expire over various time limits.

_utma – Persistent. It does not expire.
_utmb – Clears at the end of a session.
_utmc – Clears 30 minutes after the session has ended and not been re-opened.
_utmz – Clears after 6 months.



  • has_js

Some features of our site use Javascript. This cookie tells us if you have JavaScript enabled so we can give you the best possible experience.

This cookie will expire when the session ends.

Display Preferences

  •  Cookies beginning with block-facetapi

If you filter results in a search it’s convenient for the website to remember which filters you’re using. These cookies store that information.

This will expire after 48 hours.

  • Drupal.tableDrag.showWeight

This cookie helps consistent navigation across tabbed pages and forms.

This will expire after a year.



  • SESS<id#>

These cookies helps us to identify you as a user and remember all the settings and preferences you have.

They will expire after 23 days.

Please note that third parties (including, for example, advertising networks and providers of external services like web traffic analysis services) may also use cookies, over which we have no control.

You block cookies by activating the setting on your browser that allows you to refuse the setting of all or some cookies. However, if you use your browser settings to block all cookies (including essential cookies) you may not be able to access all or parts of our site.

Except for essential cookies, all cookies will expire. Please see the list of individual cookies for expiration dates.