We welcome all comments, suggestions, contributions and indeed all feedback from visitors. To this end we've deployed a comment service which can be found at the foot of every page on the site. This lets you add a comment on the page you are viewing and indeed having done so other visitors to the page can reply to your comment or make one themselves.  So in some ways you can have threaded discussions with other visitors.

Due to the sheer amount of spam you do need to login to be able to add a comment but you can also use your Facebook, Twitter, Yahoo or Google account to login. Failing that you can create an account with Disqus.  Having then logged in you can now add your comment but again due to spam every comment has to be moderated before it will appear on the site. This system is very like the major newspaper sites where you can comment on any news story but in our case you will be commenting on any of our tens of thousands of web pages.

Using this system you can correct an error in information on the page or indeed add new information. You can also ask a question or discuss some aspect of the information we provide. Being an educational and research site the comment system provides a way to develop better and more accurate information and allows you to get involved.

We hope you will make good use of this new service.