a series of changes to British law in 1995, officially called the Criminal Justice and Public Order Act, which changed the law relating to a person's right to silence (=their right to say nothing when the policearrest them, or when they are on trial in a court of law), and also made the laws against squatting (=living in a building without the owner's permission) and trespassing (=being on someone's land without their permission) much stricter.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
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