2. Unless he is authorised by the Director, an officer of a local weights and measures authority is not to be taken to be duly authorised for the purposes of section 11 of the Estate Agents Act 1979 (which confers powers of entry and inspection in connection with the enforcement of that Act on duly authorised officers of enforcement authorities) so far as concerns the exercise of any power under paragraphs (b), (c) and (d) of sub-section (1) of that section in relation to any book or document relating to the business carried on by the Bank of England or a bank which is a bank within the meaning of section 9 of the Bankers' Books Evidence Act 1879: