143. Written questions to experts
(1) A party may put written questions about an expert's report (which must be proportionate) to an expert instructed by another party or a single joint expert.
(2) An expert's answers to questions put in accordance with paragraph (1) shall be treated as part of the expert's report.
(3) Where a party has put a written question to an expert instructed by another party and the expert does not answer that question, the Court may make one or both of the following orders in relation to the party who instructed the expert —
(a) that the party may not rely on the evidence of that expert; or
(b) that the party may not recover the fees and expenses of that expert from any other party.