Insurers who, under the Motor Insurers’ Bureau’s Unisured Drivers Agreement, settle a third party claim because at the time of the accident a policy, albeit invalid, issued by them was in force in respect of the defendant. The payment is made notwithstanding that the defendant, by reason of breach of policy, had no valid right to indemnity under the policy. As insurer concerned they have a right of recovery against the uninsured motorist himself.