A cookie is a file containing an identifier (a string of letters and numbers) that is sent by a web server to a web browser, and stored by the browser. The identifier is then sent back to the server each time the browser requests a page from the server. This enables the web server to identify and track the web browser.
We use both "session" cookies and "persistent" cookies on the website. Session cookies will be deleted from your computer when you close your browser. Persistent cookies will remain stored on your computer until deleted, or until they reach a specified expiry date.
We will use the session cookies to: keep track of you whilst you navigate the website; and to store common variables during your visit.
Most browsers allow you to reject all cookies, whilst some browsers allow you to reject just third party cookies. For example, in Internet Explorer you can refuse all cookies by clicking "Tools", "Internet Options", "Privacy", and selecting "Block all cookies" using the sliding selector. Blocking all cookies will, however, have a negative impact upon the usability of many websites.