Police and Criminal Evidence Act 1984 ss 24-25; original versions
24. Arrest without warrant for arrestable offences.
(1) The powers of summary arrest conferred by the following subsections shall apply
(a) to offences for which the sentence is fixed by law;
(b) to offences for which a person of21 years of age or over (not previously convicted) may be sentenced to imprisonment for a term of five years (or might be so sentenced but for the restrictions imposed by section 33 of the Magistrates ' Courts Act 1980); and
(c) to the offences to which subsection (2) below applies,
and in this Act " arrestable offence " means any such offence.
(2) The offences to which this subsection applies are -
(a) offences for which a person may be arrested under the customs and excise Acts, as defined in section 1(1) of the Customs and Excise Management Act 1979;
(b) offences under the Official Secrets Act 1911 and 1920 that are not arrestable offences by virtue of the term of imprisonment for which a person may be sentenced in respect of them;
(c) offences under section 14 |(indecent assault upon a woman), 22 (causing prostitution of women or 23 (procuration of a girl under 21) of the Sexual Offences Act 1956;
(d) offences under section 12(1) (taking motor vehicle or other conveyance without authority etc) or 25(1) (going equipped for stealing etc) of the Theft Act 1968; and
(e) offences under section of the Public Bodies Corrupt Practices Act 1889 (corruption in office) or section 1 of the Prevention of Corruption Act 1906 (corrupt transactions with agents).
(3) Without prejudice to section 2 of the Criminal Attempts Act 1981, the powers of summary arrest conferred by the following subsections shall also apply to the offences of -
(a) conspiring to commit any of the offences mentioned in subsection (2) above;
(b) attempting to commit any such offence;
(c) inciting, aiding, abetting, counselling or procuring the commission of any such offence;
and such offences are also arrestable offences for the purposes of this Act.
(4) Any person may arrest without a warrant -
(a) anyone who is in the act of committing an arrestable offence;
(b) anyone whom he has reasonable grounds for suspecting to be committing such an offence.
(5) Where an arrestable offence has been committed, any person may arrest without a warrant -
(a) anyone who is guilty of the offence;
(b) anyone whom he has reasonable grounds for suspecting to be guilty of it.
(6) Where a constable has reasonable grounds for suspecting that an arrestable offence has been committed, he may arrest without a warrant anyone whom he has reasonable grounds for suspecting to be guilty of the offence.
(7) A constable may arrest without a warrant -
(a) anyone who is about to commit an arrestable offence;
(b) anyone whom he has reasonable grounds for suspecting to be about to commit an arrestable offence.
25. General arrest conditions
(1) Where a constable has reasonable grounds for suspecting that any offence which is not an arrestable offence has been committed or attempted, or is being committed or attempted, he may arrest the relevant person if it appears to him that service of a summons is impracticable or inappropriate because any of the general arrest conditions is satisfied.
(2) In this section " the relevant person " means any person whom the constable has reasonable grounds to suspect of having committed or having attempted to commit the offence or of being in the course of committing or attempting to commit it.
(3) The general arrest conditions are -
(a) that the name of the relevant person is unknown to, and cannot be readily ascertained by, the constable;
(b) that the constable has reasonable grounds for doubting whether a name furnished by the relevant person as his name is his real name;
(c) that -
(i) the relevant person has failed to furnish a satisfactory address for service; or
(ii) the constable has reasonable grounds for doubting whether an address furnished by the relevant person is a satisfactory address for service;
(d) that the constable has reasonable grounds for believing that arrest is necessary to prevent the relevant person -
(i) causing physical injury to himself or any other person;
(ii) suffering physical injury;
(iii) causing loss of or damage to property;
(iv) committing an offence against public decency; or
(v) causing an unlawful obstruction of the highway;
(e) that the constable has reasonable grounds for believing that arrest is necessary to protect a child or other vulnerable person from the relevant person.
(4) For the purposes of subsection (3) above an address is a satisfactory address for service if it appears to the constable -
(a) that the relevant person will be at it for a sufficiently long period for it to be possible to serve him with a summons; or
(b) that some other person specified by the relevant person will accept service of a summons for the relevant person at it.
(5) Nothing in subsection (3)(d) above authorises the arrest of a person under sub-paragraph (iv) of that paragraph except where members of the public going about their normal business cannot reasonably be expected to avoid the person to be arrested.
(6) This section shall not prejudice any power of arrest conferred apart from this section.