The defendant owed no contractual duty to the plaintiff. Nevertheless, a professional person can be liable in tort to other persons than his client for breach of a duty to use reasonable care in the performance of his professional activities: Haig v. Bamford et al., 1976 CanLII 6 (SCC), [1977] 1 S.C.R. 466; 9 N.R. 43.
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