You need to confirm if the address on the warrant matches your current address. If it doesn't, the warrant is considered "defective" and cannot be enforced. Contact the TEC at 0300 123 1059, providing the PCN number initially. During the security check, provide your previous postcode if it differs. If they validate that postcode, it indicates the warrant contains your previous address, rendering it "defective."
If you appeal the PCN with the TEC and provide your current address on the TE or PE forms, your appeal will be "rejected", and the TEC will modify the address on the warrant. If this occurs, enquire with the TEC about the issue date of the original warrant. If this date precedes your moving to your current address, Newlyn is in breach for not issuing a Notice of Enforcement, as mandated by Paragraph 7.1 of Schedule 12 of the Tribunals Courts and Enforcement Act 2007.