To make this site work properly, we sometimes place small data files called cookies on your device. Most big websites do this too.

What are cookies?
A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don't have to keep re-entering them whenever you come back to the site or browse from one page to another.

How do we use cookies?
Cookies enable us to identify your device. We use cookies that are strictly necessary to enable you to move around the site or to provide certain basic features. We also use cookies to help us to improve the performance of our website to provide you with a better user experience.

We use two types of cookies: session cookies and persistent cookies. Session cookies only last for as long as the session (usually the current visit to a web site or a browser session). Persistent cookies are used to helps us recognize you as an existing user so it's easier to access our site on your return. 

Typically, we use cookies to deliver the following services throughout the pages of our websites:

- To enable us to recognise your device so you don't have to give the same information repeatedly; 
- To record what people like and don't like on the website and the popularity of various elements of the website so that we can ensure that it works properly at points of high usage. 

How to control cookies
You can control and/or delete cookies as you wish. You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.