“This Offer is made pursuant to Part 36 of the Civil Procedure Rules and it is intended to be a claimant's Part 36 offer. Accordingly, if your client accepts this Offer within 21 days (the relevant period), being by 4 pm on19 July 2019 or any time thereafter, your client will be liable for our client's costs, in accordance withCPR 36.13 . This Offer will remain open unless and until it is accepted or withdrawn.”