Cookies on this site

To make full use of some of the features on this website, your web browser will need to accept cookies.

This page lists the cookies which may be sent to your browser by this site and what we use each cookie for. Please bear in mind that if you disable cookies in your browser, certain features of this website cannot be provided to you.

Cookies used on this site

Below is a list of the main cookies used by this site and what each is used for:

Cookie Name	What we use them for
__utma, __utmt, __utmb, __utmc, __utmz, __utmv, _ga, _gid, _gat, _gac_<property-id>, _gac_gb_<container-id> , _gcl_au	These are cookies used by Google Analytics, more information can be found on Google's cookie usage page. Determine which domain to measure Distinguish unique users Throttle the request rate Remember the number and time of previous visits Remember traffic source information Determine the start and end of a session Remember the value of visitor-level custom variables
__RequestVerificationToken	This is an anti-forgery cookie set by web applications built using Microsoft .NET based technologies. It is designed to stop unauthorised posting of content to a website. It holds no information about the user and is destroyed on closing the browser.
ASP.NET_SessionId	Used to store information to enhance the overall user experience of this site. This site may use this cookie to remember certain settings and where a user been in the site.
_fbp, _fbc	Cookies used by Meta to track user session information.
_gaexp	Used by Google Optimize to determine a user's inclusion in a test and the expiry of tests a user has been included in .
Tran_id	Used to identify unique transactions on our website.
lightbox-[lightbox ID]	Used to remember if a site user has closed a lightbox.
nmstat  AWSALB  AWSALBCORS	Used to collect statistics about site usage, more information can be found on SiteImprove's cookie page.
CookieControl	Used by our Cookie Management Tool to remember your cookie preferences.

More information about cookies

If you wish to learn more about cookies, please visit www.aboutcookies.org.

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