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A cookie consists of information sent by a web server to a web browser and stored by the browser. The information is then sent back to the server each time the browser requests a page from the server. This enables the web server to identify and track the web browser.  

Most browsers allow you to reject all cookies, whilst some browsers allow you to reject just third-party cookies.  For example, in Microsoft Edge you can refuse all cookies by clicking “Settings”, “”, “Cookies and site permissions”, and turn off the slider “Allow sites to save and read cookie data”. Blocking all cookies will, however, prevent event booking and access to the thirtyone:eight portal and member specific content.

We use two categories of cookies: necessary and Google Tag Manager.

Necessary cookies

Necessary cookies make the website work the way it works. If you choose Reject All on the Cookie Controller these necessary cookies will be still be used. At a technical level the cookies used are:-

ARRAfinity & ARRAffinitySameSite
Used for load balancing to make sure the visitor page requests are routed to the same server in any browsing session.

Used to maintain an anonymised user session by the server.

Used to stop unauthorised posting of content to a website, known as Cross-Site Request Forgery. It holds no information about the user and is destroyed on closing the browser.

Used to record the user's acceptance of cookie policy.

Used to record the user's dismissal of site notifications.

Used to authenticate users when they log in to the front-end site.

Google Tag Manager

Enabling this cookie option allows us to measure how the website is performing and statistics about the pages that are being viewed. It will also allow us to measure the effectiveness of our advertising campaigns. These cookies will be used if you move the slider on the Cookie Control to on or choose Accept All. Google will store this information and their privacy policy which is available at

Change Cookie Choices