A person arrested for an offence shall not be kept in police detention except in accordance with the provisions of this Part of this Act.
Subject to subsection (3) below, if at any time a custody officer—
it shall be the duty of the custody officer, subject to subsection (4) below, to order his immediate release from custody.
No person in police detention shall be released except on the authority of a custody officer at the police station where his detention was authorised or, if it was authorised at more than one station, a custody officer at the station where it was last authorised.
A person who appears to the custody officer to have been unlawfully at large when he was arrested is not to be released under subsection (2) above.
A person whose release is ordered under subsection (2) must be released on bail if subsection (5A) applies.
This subsection applies if—
A person whose release is ordered under subsection (2) must be released without bail if subsection (5A) does not apply.
Subsection (5C) applies where—
The custody officer must give the person notice in writing that the person is not to be prosecuted.
Subsection (5C) does not prevent the prosecution of the person for an offence if new evidence comes to light after the notice was given.
In this Part "caution" includes—
For the purposes of this Part of this Act a person arrested under section 6D of the Road Traffic Act 1988or section 30(2) of the Transport and Works Act 1992 (c. 42) is arrested for an offence.
Subsection (7) does not apply in relation to a person who is granted bail subject to the duty mentioned in section 47(3)(b) and who either—
(provision as to the treatment of such persons for the purposes of this Part being made by section 46ZA).