An inspector may, without the occupier’s consent or a warrant, enter—
(a) a public place; or
(b) a place where an authorised game is being, or is about to be, conducted; or
(c) a place where an authorised provider or an agent carries on business at any time when the place is open for carrying on business or otherwise open for entry; or
(d) the land around premises to ask its occupier for consent to enter the premises.