However, in Mansfield v Weetabix Ltd [1998] 1 WLR 1263 the Court of Appeal adopted an alternative view. Here a lorry driver crashed his vehicle into the claimant’s shop after suffering a hypoglycaemic state. There was no evidence that the driver knew that his ability to drive was impaired. The Court of Appeal held that the defendant should be judged in comparison with a reasonably competent driver who is unaware that he is suffering a condition that impairs his ability to drive. The driver was thus found not liable.