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:


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


Cookie Name Purpose Default Expiration Time
Analytical cookies _utma Used to distinguish visitors and sessions. 2 years from set/update
  _utmb Used to determine new sessions/visits. 30 mins from set/update
  _utmc Operated in conjunction with the _utmb cookie to determine whether you were in a new session/visit. End of browser session
  _utmz Stores the traffic source or campaign that explains how you reached our site. 6 months from set/update
  _utmv Used to store your custom variable data. 2 years from set/update


Please note that third parties (including, for example, providers of external services like web traffic analysis services) may also use cookies, over which we have no control. These cookies are likely to be analytical/performance cookies or targeting cookies.


You can 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.


Updated 23 March 2017