Without prejudice to Article 29(2)(c), anything authorised or required by the provisions of this Order, to be done at any time by, to or with a landlord, shall, if at that time the estate of the landlord in question is subject to a mortgage and the mortgagee is in possession or a receiver is in receipt of the rents and profits, be deemed to be authorised or required to be done by, to or with the mortgagee instead of that landlord.