Nothing in this Act shall divest the Commissioners for the Time being of Her Majesty's Works and Public Buildings of any Power or Property now or which for the Time being may be vested in them; and nothing in this Act shall extend to authorize or empower any Vestry or District Board to exercise any Power or Control whatsoever in or over any of the Royal or Public Parks; Gardens, or Pleasure Grounds, the Management whereof is now or may be for the Time being vested in such Commissioners ; and nothing in this Act shall abridge, alter, or affect any Right, Power, Exemption, or Remedy of the Queen's most Excellent Majesty, Her Heirs or Successors, or the said Commissioners, in, over, or in relation to the Possessions of the Crown or of the Public.