&gt; They have ZERO authority to request you to stop

What gave you this idea? In the Transport (Compliance and Miscellaneous) Act 1983, section 219 - Power to arrest suspected offenders:

&gt; "if a member of the police force, a protective services officer on duty at a designated place or an authorised officer believes on reasonable grounds that a person has committed an offence against this Act [...] [the] member or officer may without warrant arrest the person if the member or officer believes on reasonable grounds that the arrest is necessary for any one or more of the following reasons-

&gt;   (a) to ensure the appearance of the person before a court of competent jurisdiction; or

&gt;   (b)  to preserve public order; or

&gt;   (c)  to prevent the continuation or repetition of the offence or the commission of a further offence; or

&gt;   (d)  for the safety or welfare of members of the public or of the person.