Nothing in this Act contained shall authorize any Person to purchase, take, use, or interfere with, or the Commissioners to make any Order with respect to any Land, Soil, or Water, or any Right in respect thereof, belonging to Her Majesty in right of Her Crown, without the previous Consent in Writing of the Commissioners for the Time being of Her Majesty's Woods, Forests, and Land Revenues, or, if the Property should be under the Management or Control of Her Majesty's Commissioners of Works and Public Buildings, without the Consent in Writing of such last-mentioned Commissioners, which Consent the said respective Commissioners are hereby authorized to give; and nothing in this Act contained shall divert, alter, or affect any of the Rights, Powers, or Estates vested in Her Majesty in right of Her Crown.