To withdraw your cash funds, simply go to the "Withdraw" page of your account. See link: https://www.admiralcasino.co.uk/en/user/payout  
Please note, that only a payment method which has been used to make a deposit on your account can be used for withdrawal.
Withdrawal via bank transfer is always available, regardless of which deposit methods have been used.
Deposits and withdrawals should only be made using payment methods registered in your own name.