" Be that as it may, in my judgment the new Part 36 regime cannot accommodate a time limited offer. The essence of a Part 36 offer is that it lies on the table until formally withdrawn. Only an offer which has not been withdrawn down to the commencement of trial is capable of having the scheme's costs consequences set out in rule 36.14. A part 36 offer can be accepted at any time unless withdrawn. Therefore the scheme seeks to encourage offers which are not time limited. The scheme nevertheless permits flexibility in permitting offers to be amended and withdrawn. The process however is strictly regulated in the interests of clarity and certainty."
"2. In addition, we will pay predictive costs incurred up until 21 days after the date on which you receive this letter."
"Nothing in this section prevents a party from making an offer to settle in whatever way he chooses, but if the offer is not made in accordance with rule 36.2 it will not have the consequences specified in rules 36.10, 36.11 and 36.14. "