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Information about cookies

Cookies are pieces of data that a website can transfer to a user’s web browser. When you visit, if your browser is using the standard settings and it is accepting cookies, you are giving consent for cookies from this site to be stored on your computer. The cookies stored may remain on your computer after you leave

If you do not wish for this to happen, you can adjust your web browser to refuse cookies or to warn you when cookies are being used. You can also manually delete them in your browser settings. Most elements of will still function if you disable cookies in your web browser settings.

You can find more information about cookies, including how to see what cookies have been set on your device and how to manage and delete them at

At different types of cookies are used:

Strictly necessary

Cookie TypeNamePurposeExpires
Matomomtm_cookie_consentThis is stored to remember that consent for storing and using cookies was given by the user.30 years

Performance cookies

Cookie TypeNamePurposeExpires
Matomo_pk_idThis is used to store a few details about the user such as the unique visitor ID.1 year, 1 month
_pk_refThis is used to store the attribution information, the referrer initially used to visit the website.6 months
_pk_sesThis is used to store a unique session ID.30 minutes
_pk_cvarThis is used to store a unique session ID.30 minutes
_pk_hsrThis is used to store a unique session ID.30 minutes
_pk_testcookieThis is used to check whether the visitor’s browser supports cookies.Session
Matomo_sessidThis is used to store a unique session ID.Session

If you actively change the settings to allow performance cookies, you are giving your consent for Matomo to collect information about how you use and navigate our site. During this process, your IP address will be anonymised. We use this information to improve the user experience for all visitors to our homepage.

Functionality cookies

These are cookies that are not essential, but they enhance your use of

Cookie TypeNameExpiresPurpose
Persistent cookiecookieconsent_status1 yearsThis cookie is associated with a script which shows a cookie alert notice on the website. It is used to record when the user has dismissed the notice to prevent it re-appearing on return visits.