12.2.—(1) Where a witness is to give evidence at a hearing, subject to rule 12.3, the witness’s evidence must be given orally under oath or solemn affirmation.
(2) Where—
(a)a witness statement has been served in accordance with rule 11.4,
(b)an expert report has been served in accordance with rule 11.5, or
(c)the court has allowed an application to give evidence under any of rules 13.1 to 13.3 (which require such applications to be accompanied by a witness statement),
the witness statement or report is to stand as the evidence in chief of the witness unless the court directs otherwise.
(3) A witness who gives oral evidence at a hearing may be cross-examined by any party to the proceedings (subject to any direction given under 11.2(2)(f) and to paragraph (4) of this rule).
(4) The court may limit cross-examination.