Not all insurance policies respond the same way when something goes wrong — especially when it comes to Liability vs Professional Indemnity. Occurrence-based policies (i.e. Public Liability) cover events that happen during the policy period, even if the claim is made years later. Claims-made policies (i.e. Professional Indemnity) cover claims that are made while the policy is active, regardless of when the work was done. Cancelling this type of policy means you're not cover