11Sections 28 to 30 of this Act shall not apply to any land the acquisition of which was, immediately before the commencement of those sections, authorised by a compulsory purchase order made by a local authority or statutory undertakers or by a Minister, or was then proposed to be authorised by such an order which had not been confirmed by a Minister or, as the case may be, had been prepared in draft by a Minister, but with respect to which a notice had then been published in accordance with paragraph 3(a) of Schedule 1 to the Acquisition Act 1947.