linguistic:paraphrasing, stylistic:tone, structural:reformatting
Breach of duty

In Donoghue v Stevenson, Lord Macmillan declared that "the categories of negligence are never closed"; and in Dorset Yacht v Home Office it was held that the government had no immunity from suit when they negligently failed to prevent the escape of juvenile offenders who subsequently vandalise a boatyard. In other words, all members of society have a duty to exercise reasonable care toward others and their property. In Bolton v. Stone (1951), the House of Lords held that a defendant was not negligent if the damage to the plaintiff were not a reasonably foreseeable consequence of his conduct. In the case, a Miss Stone was struck on the head by a cricket ball while standing outside a cricket ground. Finding that no batsman would normally be able hit a cricket ball far enough to reach a person standing as far away as was Miss Stone, the court held her claim would fail because the danger was not reasonably or sufficiently foreseeable. As stated in the opinion, "reasonable risk" cannot be judged with the benefit of hindsight. In Roe v Minister of Health, Lord Denning said the past should not be viewed through rose coloured spectacles, finding no negligence on the part of medical professionals accused of using contaminated medical jars, since contemporary standards would have indicated only a low possibility of medical jar contamination.