Cookies are text files containing small amounts of information which are downloaded to your personal computer, mobile or other device when you visit a website. Cookies are then sent back to the originating website on each subsequent visit, or to another website that recognises that cookie. Cookies are useful because they allow a website to recognise a user's device.

• Persistent cookies - these cookies remain on a user's device for the period of time specified in the cookie. They are activated each time that the user visits the website that created that particular cookie.
• Session cookies - these cookies allow website operators to link the actions of a user during a browser session. A browser session starts when a user opens the browser window and finishes when they close the browser window. Session cookies are created temporarily. Once you close the browser, all session cookies are deleted.

Cookies do lots of different jobs, like letting you navigate between pages efficiently, remembering your preferences, and generally improve the user experience.

We use the following cookies:

Category	Cookie Name	Purpose
Necessary Cookies	PHPSESSID	Necessary cookies enable core functionality. The website cannot function properly without these cookies, and can only be disabled by changing your browser preferences.
Necessary Cookies	__utma, __utmb	These cookies are used to store information, such as what time your current visit occurred, whether you have been to the site before, and what site referred you to the web page.
Necessary Cookies	__utmc	These cookies contain no personally identifiable information but they will use your computer’s IP address to know from where in the world you are accessing the Internet.
Necessary Cookies	__utmv, __utmz	Google stores the information collected by these cookies on servers in the United States. Google may 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.

In order to provide website visitors with more choice on how data is collected by Google Analytics, Google has developed the Google Analytics Opt-out Browser Add-on. The add-on communicates with the Google Analytics JavaScript (ga.js) to stop data being sent to Google Analytics. The Google Analytics Opt-out Browser Add-on does not affect usage of the website in any other way. A link to further information on the Google Analytics Opt-out Browser Add-on is provided below for your convenience.

Download the Addon Click here

For more information on the usage of cookies by Google Analytics please see the Google website. A link to the privacy advice for this product is provided below for your convenience. Click here

These cookies allow third parties to track the success of their application or customise the application for you. Because of how cookies work we cannot access these cookies, nor can the third parties access the data in cookies used on our site. For example, if you choose to ‘share’ content through Twitter or other social networks you might be sent cookies from these websites. We don't control the setting of these cookies, so please check those websites for more information about their cookies and how to manage them.

If you would like to restrict the use of cookies you can control this in your Internet browser. Links to advice on how to do this for the most popular Internet browsers are provided below for convenience and will be available for the Internet browser of your choice either online or via the software help (normally available via key F1).

• Internet Explorer
• Google Chrome
• Mozilla FIrefox