(1) Whenever a vehicle has been involved in an accident in a public place, an authorised person may -
(a) investigate the circumstances in which the accident occurred,
(b) enter (on production of his authority if so demanded by the owner or person in charge of the premises hereinafter mentioned) at any reasonable time any premises where there is a vehicle which was involved in the accident,
(c) carry out such inspection and examination (including a test) as appear to him to be reasonably necessary for the purposes of the investigation,
(d) do such things and make such requirements as appear to him to be reasonably necessary for the purposes of the investigation and, in particular,
(i) require, by summons, the attendance of all such persons as he thinks fit to call before him and examine for the purposes of his report and require answers or returns to any inquiries which he thinks fit to make,
(ii) require any person to produce such books, papers, other documents and any articles (being
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