1. Log into the Admiral Casino site
2. Go to Account and click on the "Account" section in the navigation
3. Once in the Account section, click on the "Documents" tab
4. Then upload valid ID by using the "Choose File" button, you will be able to search for the correct file.
5. Once you have selected your ID, you can select the "Save" button to update your account.
See Documents link: https://www.admiralcasino.co.uk/en/user/personal-settings/documents