“17.—(1) This paragraph applies where, in any case on indictment in the Crown Court in respect of which a graduated fee is payable under Part 2 or Part 3— (a) it has been necessary for an advocate to do work by way of preparation substantially in excess of the amount normally done for cases of the same type because the case involves a very unusual or novel point of law or factual issue.” (2) Where this paragraph applies, a special preparation fee may be paid, in addition to the graduated fee payable under Part 2 or Part 3 (3) The amount of the special preparation fee must be calculated— (a) where sub-paragraph (1)(a) applies, from the number of hours preparation in excess of the amount the appropriate officer considers reasonable for cases of the same type;”