(1)  A police officer may arrest without warrant a person –

(a) who is on business premises; and

(b) who the police officer reasonably believes is committing, or has committed within the previous 3 months, an offence, against a provision of this Act, on or in relation to –

(i) the business premises; or

(ii) a business access area in relation to the business premises.

(2)  A police officer may arrest without warrant a person –

(a) who is on a business access area in relation to business premises; and

(b) who the police officer reasonably believes is committing, or has committed within the previous 3 months, an offence, against a provision of this Act, on or in relation to –

(i) the business premises; or

(ii) a business access area in relation to the business premises.

(3)  A police officer may remove from business premises, or a business access area in relation to business premises, a person who the police officer reasonably believes is committing, or has committed, an offence against a provision of this Act, or a contravention of section 6(1) , (2) or (3) , on or in relation to –

(a) the business premises; or

(b) a business access area in relation to the business premises.

(4)  A police officer may only arrest a person under subsection (1) or (2) , or remove a person under subsection (3) , if the police officer reasonably believes that it is necessary to do so for any of the following purposes:

(a) to ensure the attendance of the person before a court of competent jurisdiction;

(b) to enable the detention of the person in accordance with the Criminal Law (Detention and Interrogation) Act 1995 ;

(c) to preserve public order;

(d) to prevent the continuation or repetition of an offence against a provision of Part 2 ;

(e) for the safety or welfare of members of the public or of the person –

and may detain a person so arrested only for so long as is necessary to fulfil the purpose, or purposes, for which the person was arrested.