31.—[F1(1)] Where for the purpose of assisting with an investigation a person attends voluntarily at a police station or at any other place where a constable is present or accompanies a constable to a police station or any such other place without having been arrested—
(a)he shall be entitled to leave at will unless he is placed under arrest;
(b)he shall be informed at once that he is under arrest if a decision is taken by a constable to prevent him from leaving at will.
[F2(2) Where—
(a)a person is taken to a police station in pursuance of a direction under section 16 of the Prison Act (Northern Ireland) 1953; and
(b)while he is there it appears to a constable that he is liable to arrest for an offence,
he shall be arrested for that offence.]
Modifications etc. (not altering text)
C1Art. 31 applied (with modifications) (1.12.2007) by Police and Criminal Evidence (Application to Revenue and Customs) Order (Northern Ireland) 2007 (S.R. 2007/464), arts. 3-15, Sch. 1, Sch. 2
C2Art. 31 applied (with modifications) (18.5.2009) by Police and Criminal Evidence (Application to the Police Ombudsman) Order (Northern Ireland) 2009 (S.R. 2009/142), art. 3, Sch. 1, Sch. 2