Cookies can be stored for varying lengths of time on your browser or device. Session cookies are deleted from your computer or device when you close your web-browser. Persistent cookies will remain stored on your computer or device until deleted or until they reach their expiry date.
If you would like to disable these cookies, you will need to do so using your browser. Different browsers make different controls available to you. Generally, your browser will offer you the choice to accept, refuse or delete cookies at all times, or those from providers that website owners use i.e. third party cookies, or those from specific websites. Each browser’s website should contain instructions on how you can do this.
For further information please refer to: https://www.aboutcookies.org/how-to-delete-cookies/