19.8.—(1) No written evidence may be relied on at the hearing of the application unless—
(a)it has been served in accordance with rule19.7; or
(b)the court gives permission.
(2) The court may require or permit a party to give oral evidence at the hearing.
(3) The court may give directions requiring the attendance for cross-examination(GL) of a witness who has given written evidence. (Rule 22.1 contains a general power for the court to control evidence.)