33C.—Where a post-mortem examination has been directed by a coroner under section 33 or 33A, the coroner may direct the same registered medical practitioner, or another registered medical practitioner, to make a further post-mortem examination of the body of the deceased person concerned if the coroner is of opinion that—

(a) a further post-mortem examination is necessary as further information relating to the death, or the circumstances of the death, becomes known after the first post-mortem examination was made, or

(b) the first post-mortem examination was not made properly.]