It is simple to Self Exclude, see steps below:
1. Log into Admiral Casino.
2. Click on your "Account"
3. Select "Exclusion" in the left hand menu.
4. Then select the interval you wish to set, from 6 months to 5 years.
5. Enter your password and Save
See link :  https://www.admiralcasino.co.uk/en/user/self-exclusion