Often claimants in professional negligence cases are unable to establish that their loss was caused by the defendant. Peter Mansfield looks at the crucial – but often undervalued – concept of causation

Causation is crucial in professional negligence cases. Proving that a defendant has been negligent is not enough; neither is proving that the claimant has suffered a loss. In order to succeed, a claimant must also prove that the defendant’s negligence caused the claimant’s loss.