Cookies and Privacy

These cookies are essential for us to provide a good web service to you.  None are used for marketing purposes, and no personal information is stored in (or accessed by) our cookies. They just help our site work.

We use them on this website to improve services for you by, for example:

• making sure your device is recognised so that you don't have to give the same information several times during one task
• measuring how many people are using our website, so we can make sure that we can meet the demand
• understanding how people access the information on our site via search engines, so we can tailor it to make information easier to find.