Estimating our audience size and usage pattern.;
Storing information about your preferences, and allowing us to customise our Site according to your individual interests.;
Speeding up your searches.; and
Recognising you when you return to our Site.
Our Site uses both session cookies and persistent cookies. Session cookies enable you to move from page to page within our Site and any information you enter to be remembered. A session cookie is deleted when you close your browser or after a short time. Persistent cookies allow our Site to remember your preferences and settings when you visit the Site in the future. Persistent cookies expire after a set period of time.