151. Restriction on disclosure of a Part 18 offer
(1) A Part 18 offer will be treated as "without prejudice save as to costs".
(2) The fact that a Part 18 offer has been made and the terms of such offer must not be communicated to the trial Judge until the case has been decided.
(3) Paragraph (2) of this Rule does not apply —
(a) where the defence of tender before claim has been raised;
(b) where the proceedings have been stayed following the acceptance of a Part 18 offer;
(c) where the offeror and offeree agree in writing that it should not apply; or
(d) where, although the case has not been decided in full, any part of, or issue in, the case has been decided and the offer related only to the parts or issues that have been decided.
(4) In a case to which paragraph (3)(d) applies, the trial Judge may be told whether or not there are Part 18 offers other than those referring to the parts or issues that have been decided, but must not be told the terms of any such offers unless any of paragraphs (3)(a) to (c) applies.
(5) Paragraph (2) is without prejudice to Rule 78, and where a party requests a stay under that rule that party may inform the Court or the trial Judge, as the case may be, whether or not there is a Part 18 offer; but the parties must not inform the Court or the trial Judge, as the case may be, of the terms of any such offer or which party or parties made the offer and to whom the offer was made.