Cookies are small text files that are placed on your computer by websites that you visit. They are widely used in order to make websites work, or work more efficiently, as well as to provide information to the owners of the site.

By using this site you are consenting to their use.

If you would prefer not to receive cookies, you can modify your browser so that it notifies you when cookies are sent to it or you can refuse cookies altogether. You can also delete cookies that have already been set.

If you would like to restrict or block web browser cookies which are set on your device then 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 desktop browsers.

The table below explains the cookies we use and why.

Cookie Type Duration Description
Google Analytics Anonymous Analytics Cookies 2 Years

Every time a user visits our website, web analytics software provided by a third party generates an anonymous analytics cookie.

These cookies can tell us whether or not you have visited the site before. There are four cookies, namely: _utma, _utmb, _utmc, and _utmd.

Your browser will tell us if you have these cookies, and if you don’t, we generate new ones.

This allows us to track how many individual unique users we have, and how often they visit the site.

These cookies cannot be used to identify individuals; they are used for statistical purposes only.

Page Caching Strictly Necessary for Site Performance Until Browser Is Closed

The site uses a caching plugin to ensure that the website loads quickly and performs well for all its users. This cookie is strictly necessary for the caching plugin to work. The cookie is named w3tc_referrer.

Site Cookie Acceptance Essential Cookie 1 Year

This cookie is used to record if a user has accepted the use of cookies on our website. It has the name viewed_cookie_policy.

To opt out of being tracked by Google Analytics across all websites visit