Cookies are small text files they are stored by your browser onto your computer or mobile device. They are widely used in order to make websites work or work in a better, more efficient way. They can do this because websites can read and write these files, enabling them to recognise you and remember important information that will make your use of a website more convenient (eg by remembering your user preferences).
A session cookie is used each time you visit our website to give you a session ID. We use this type of cookie to link your actions on our website and each session cookie will only last for a browser session, at the end of which it will expire. Each browser session will start when you open your browser window and finish when you close your browser window. After your visit to our website all session cookies are deleted. Each time you visit our website you will have a different session ID.