After section 40C of the Prison Act 1952 insert—
(1)A person who, without authorisation, is in possession of an article specified in subsection (2) inside a prison is guilty of an offence.
(2)The articles referred to in subsection (1) are—
(a)any article that has a blade or is sharply pointed;
(b)any other offensive weapon (as defined in section 1(9) of the Police and Criminal Evidence Act 1984).
(3)In proceedings for an offence under this section it is a defence for the accused to show that—
(a)he reasonably believed that he had authorisation to be in possession of the article in question, or
(b)in all the circumstances there was an overriding public interest which justified his being in possession of the article.
(4)A person guilty of an offence under this section is liable—
(a)on conviction on indictment, to imprisonment for a term not exceeding four years or to a fine (or both);
(b)on summary conviction, to imprisonment for a term not exceeding 12 months or to a fine (or both).
(5)In this section “authorisation” means authorisation given for the purposes of this section; and subsections (1) to (3) of section 40E apply in relation to authorisations so given as they apply to authorisations given for the purposes of section 40D.”