5.—(1) This article applies if a person knows or suspects that an appropriate officer is acting (or proposing to act) under this Part in connection with an external investigation.
(2) A person commits an offence if—
(a)they make a disclosure which is likely to prejudice the external investigation, or
(b)they falsify, conceal, destroy or otherwise dispose of, or cause or permit the falsification, concealment, destruction or disposal of, documents which are relevant to the external investigation.
(3) A person does not commit an offence under paragraph (2)(a) if—
(a)they do not know or suspect that the disclosure is likely to prejudice the external investigation,
(b)the disclosure is made pursuant to this Part,
(c)the disclosure is made pursuant to the Proceeds of Crime Act 2002 (External Requests and Orders) Order 2005(1),
(d)the disclosure is made in the exercise of a function under the Proceeds of Crime Act 2002 or any other enactment relating to criminal conduct or benefit from criminal conduct or in compliance with a requirement imposed under or by virtue of the Proceeds of Crime Act 2002,
(e)the disclosure is of a matter within section 333A(2) or (3)(a) (money laundering: tipping off) of the Proceeds of Crime Act 2002 and the information on which the disclosure is based came to the person in the course of a business in the regulated sector, or
(f)they are a professional legal adviser and the disclosure falls within paragraph (4).
(4) A disclosure falls within this paragraph if it is a disclosure—
(a)to (or to a representative of) a client of the professional legal adviser in connection with the giving by the adviser of legal advice to the client, or
(b)to any person in connection with legal proceedings or contemplated legal proceedings.
(5) But a disclosure does not fall within paragraph (4) if it is made with the intention of furthering a criminal purpose.
(6) A person does not commit an offence under paragraph (2)(b) if—
(a)they do not know or suspect that the documents are relevant to the external investigation, or
(b)they do not intend to conceal any facts disclosed by the documents from any appropriate officer acting in connection with the external investigation.
(7) A person guilty of an offence under paragraph (2) is liable—
(a)on summary conviction, to imprisonment for a term not exceeding six months or to a fine not exceeding the statutory maximum or to both, or
(b)on conviction on indictment, to imprisonment for a term not exceeding five years or to a fine or to both.