The current powers of citizens' arrest, that apply to "any person", are broadly covered by three parts of the law. • Arrest for an "indictable offence" under the Police and Criminal Evidence Act 1984. • Arrest of persons committing, or about to commit a Breach of the Peace under common law. • Use of reasonable force to prevent crime or arrest offenders or persons unlawfully at large under the Criminal Law Act 1967. Note the word reasonable Scott, and be aware that there's also a crime of false imprisonment.