If the tenant renews the tenancy or stays at the property on a rolling tenancy, the warranty is renewed by the tenant.
If the tenant vacates the property the normal check out inspection is conducted and any dilapidation's discussed with the tenant, including any rent arrears. If the dilapidations are agreed, the tenant pays for those to be remedied. If they fail to pay, a claim is submitted to the Nil Deposit Scheme and if successful the insurer will pay out the costs and then look to recover them from the tenant.
If the tenant disputes the costs they have the option to take the claim to independent arbitration for which they pay a fee.
Please note the original insured amount does not change during the course of the tenancy, even if rent increases have been agreed.