(1)Subject to the following provisions of this section, and without prejudice to any other enactment, a constable may enter and search any premises for the purpose—
(a)of executing—
(i)a warrant of arrest issued in connection with or arising out of criminal proceedings ; or
(ii)a warrant of commitment issued under section 76 of the [1980 c. 43.] Magistrates' Courts Act 1980;
(b)of arresting a person for an arrestable offence ;
(c)of arresting a person for an offence under—
(i)section 1 (prohibition of uniforms in connection with political objects), 4 (prohibition of offensive weapons at public meetings and processions) or 5 (prohibition of offensive conduct conducive to breaches of the peace) of the [1936 c. 6.] Public Order Act 1936;
(ii)any enactment contained in sections 6 to 8 or 10 of the [1977 c. 45.] Criminal Law Act 1977 (offences relating to entering and remaining on property);
(d)of recapturing a person who is unlawfully at large and whom he is pursuing ; or
(e)of saving life or limb or preventing serious damage to property.
(2)Except for the purpose specified in paragraph (e) of subsection (1) above, the powers of entry and search conferred by this section—
(a)are only exercisable if the constable has reasonable grounds for believing that the person whom he is seeking is on the premises; and
(b)are limited, in relation to premises consisting of two or more separate dwellings, to powers to enter and search—
(i)any parts of the premises which the occupiers of any dwelling comprised in the premises use in common with the occupiers of any other such dwelling; and
(ii)any such dwelling in which the constable has reasonable grounds for believing that the person whom he is seeking may be.
(3)The powers of entry and search conferred by this section are only exercisable for the purposes specified in subsection (1)(c)(ii) above by a constable in uniform.
(4)The power of search conferred by this section is only a power to search to the extent that is reasonably required for the purpose for which the power of entry is exercised.
(5)Subject to subsection (6) below, all the rules of common law under which a constable has power to enter premises without a warrant are hereby abolished.
(6)Nothing in subsection (5) above affects any power of entry to deal with or prevent a breach of the peace.