Other cookies may be placed by third party service providers who perform functions (or other services) for us. Cookies used on this website may include the following third party services: Google Analytics, Facebook Like Button, Twitter Follow button. Some of these services may be used to track your behaviour on other websites and we have no control over this. This site uses Google Analytics, a popular web analytics service provided by Google Inc. Google Analytics uses cookies to help us to analyse how users use the site. It counts the number of visitors and tells us things about their behaviour overall - such as the typical length of stay on the site or the average number of pages a user views. Information is available here on what cookies Google uses in providing the analytics service.