A trial judge does not deny procedural fairness by accepting a plaintiff's evidence as to the mechanism of injury 'in a general sense' while making more detailed factual findings based on inferences from objective evidence (such as photographs) that differ from the plaintiff's specific account, provided the findings remain within the ambit of the material fact in issue at trial. The distinction between the 'material fact' and 'particulars' of that fact is critical: inconsistencies in particulars (such as which specific bag was tripped on, or how many bins were emptied) do not constitute a new case requiring notice to the opposing party, so long as the essential mechanism of injury remains the same. Suvaal v Cessnock City Council is confined to cases where the trial judge creates an entirely new case as to the operative cause of the accident.
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