I think that the RRFSO allows us entry in to private premises if it is indeed necessary to enforce the RRFSO.
27.—(1) Subject to the provisions of this article, an inspector may do anything necessary for the purpose of carrying out this Order and any regulations made under it into effect and in particular, so far as may be necessary for that purpose, shall have power to do at any reasonable time the following—
(a)to enter any premises which he has reason to believe it is necessary for him to enter for the purpose mentioned above and to inspect the whole or part of the premises and anything in them, where such entry and inspection may be effected without the use of force;
...
“premises” includes any place and, in particular, includes—
(a) any workplace;
(b) any vehicle, vessel, aircraft or hovercraft;
(c) any installation on land (including the foreshore and other land intermittently covered by water), and any other installation (whether floating, or resting on the seabed or the subsoil thereof, or resting on other land covered with water or the subsoil thereof); and
(d) any tent or movable structure;
I don't see where it says we can't enter just because the RRFSO doesn't apply.