Core content of the website is visible to all visitors. • Posting comments This website is interactive, allowing visitors to respond & contribute content. For security reasons, in order to post comments or media on the website you must first register, log in & confirm your age qualification or consent. • Demonstration areas The website contains demonstrations of functionality. Again for security reasons, these may be restricted to registered users. • News From time to time we will update registered users via a newsletter. When registering, or at any time, users can opt in or out of these communications.