An assessor's report commissioned by an insurer for the dominant purpose of use in anticipated litigation is protected by legal professional privilege, and that privilege is not waived by disclosure of the report to the solicitors acting for the insured where the insurer and insured share a common interest in defeating the claim. A subpoena cannot be used as a substitute for discovery. On an application for particular discovery, the applicant must establish reasonable grounds to be fairly certain the documents exist — mere speculation, assumption, or conjecture is insufficient.
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