A finding of causation on the balance of probabilities may be open even where medical science cannot explain the precise mechanism linking the putative cause to the result, provided there is a known association between the causative factor and the condition and no contrary explanation. For non-economic loss under s 151G, 'a most extreme case' denotes a class of case rather than a specific example, and the assessment involves identifying bands or ranges within which a reasonable assessment may be made, with wider ranges appropriate for cases not at the extremes of the scale.
The full text is available to signed-in members, including the 4 later cases that cite this judgment.