Freedom of Expression

( These extracts from
( http://en.wikipedia.org/wiki/Freedom_of_speech_by_country#United_Kingdom )
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Freedom of speech is the concept of the inherent human right to voice one's opinion publicly without fear of censorship or punishment. "Speech" is not limited to public speaking and is generally taken to include other forms of expression. The right is preserved in the United Nations Universal Declaration of Human Rights and is granted formal recognition by the laws of most nations. Nonetheless the degree to which the right is upheld in practice varies greatly from one nation to another. In many nations, particularly those with relatively authoritarian forms of government, overt government censorship is enforced. Censorship has also been claimed to occur in other forms (see propaganda model) and there are different approaches to issues such as hate speech, obscenity, and defamation laws even in countries seen as liberal democracies.

International law
The United Nations Universal Declaration of Human Rights, adopted in 1948, provides, in Article 19, that:

Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers.