The court by which a hospital order is made may give such directions as it thinks fit for the conveyance of the patient to a place of safety and his detention therein pending his admission to the hospital within the period of 28 days referred to in section 175(3) of this Act; but a direction for the conveyance of a patient to a residential establishment provided by a local authority under Part IV of the M1Social Work (Scotland) Act 1968 shall not be given unless the court is satisfied that that authority is willing to receive the patient therein.