For unsatisfied county court judgments, when the action taken so far hasn't persuaded the debtor to pay what they owe, the judgment will need to be served, or enforced, and you will need to choose how best to do this from the CCJ enforcement options available to you.
Another option that you can use as part of the enforcement for the County Court Judgments process, for debts with a value of more than £600.00 is a High Court Writ, where a High Court Enforcement Officer (HCEO) will visit the debtor's premises to recover the money owed. They have more powers than a standard Bailiff.