In English law, fair comment on a matter of public interest is allowed. Generally, it guarantees the freedom of the press to make statements on matters of public interest, as long as the statements are not made with ill-will, spite, or with intent to harm the subject of the comment. For decades, English courts have placed a higher burden on public figures to prove defamation, which includes both libel and slander. This is based on the view that if a person chooses public activity, that person must expect a higher degree of public scrutiny. For example, it is hardly likely that an English court will countenance a defamatory intent against a public figure where an allegation of conflict of interest is made on facts which are essentially true but could be capable of a more generous interpretation.
Fair comment is an ancient common law (judge made law) defence. But it was replaced in the Unites States in 1964 by a defence created in the case of New York Times v Sullivan in which the US Supreme Court decided that actual malice has to be proved to establish defamation. Since it is very difficult to prove actual malice in a journalist or a politician in the cut and thrust of journalism or politics, public life in the US has been largely liberated from the fear of defamation. While the defence of fair comment remained in the U.K. it was increasingly found to be too restrictive for adequate scrutiny of public officials. The courts of the UK have never adopted New York Times v Sullivan but began to test a more liberal approach to criticisms of public officials.