Perhaps best to start with an Answerbank Wealth Warning for all of our readers: Warning - solicitors can seriously damage your wealth, especially for beneficiaries stuck with a deceased's Will that names one as an Executor.
(thinks: Memo to self - must check my Will to see I haven't made the same mistake).
In terms of your question, the whole of section (b) is specifically worded to prevent future claims by the Claimant or the Second Defendant against the First Defendant (the solicitor).
That'll be another £100 off the beneficiaries inheritance - 30 minutes to have the office lackey draft the Consent Order plus time for the solicitor to check the wording.