The Senior Courts Costs Office’s decision in XX v Young & Aviva Insurance Limited [2025] EWHC 2443 (SCCO) confirms that costs judges cannot make quasi-fundamental dishonesty findings during detailed assessment proceedings.
Background
The dispute originated from a road traffic accident in which the Second Claimant, a 62-year-old woman, was struck by a vehicle driven by the First Defendant while crossing a road. The Second Defendant, Aviva Insurance Limited, was the insurer liable to satisfy any judgment. The Claimant sustained significant injuries, including pelvic and acetabular fractures requiring surgical intervention, with an anticipated earlier need for a hip replacement. The claim proceeded on quantum only, with liability remaining in dispute, and the parties eventually settled at a Joint Settlement Meeting for £149,000, a sum expressed to be “net of contributory negligence” [§49]. The consent order provided for the Second Defendant to pay the Second Claimant’s costs, to be assessed on the standard basis, with a specific term that neither party would be precluded from raising conduct issues during the assessment [§85].
The Second Claimant’s bill of costs was drawn in the sum of £517,985. The detailed assessment was heard over two separate three-day sittings before Costs Judge Nagalingam, during which interim written judgments were provided. Following the line-by-line assessment, the bill was significantly reduced to £339,565.16, a reduction of approximately 34% [§2]. A further judgment on 4 August 2025 addressed the issue of proportionality, applying an additional reduction which effectively concluded the detailed assessment. The reduction to profit costs alone, excluding the costs of the assessment, amounted to approximately 38% [§3].
Costs Issues Before the Court
The matter before the court was the Second Defendant’s application for permission to appeal the judgment of 4 August 2025. The application focused on the judge’s decision regarding proportionality and his rejection of the Second Defendant’s arguments for a costs reduction based on the alleged misconduct of the Second Claimant under CPR 44.11 [§25]. The central issue was whether the judge erred in his approach by not making further reductions to the bill on these grounds. The Second Defendant argued that the case raised important points of principle concerning the relationship between allegations of fundamental dishonesty in the substantive claim and the ability to seek costs sanctions for misconduct on assessment.
The Parties’ Positions
The Second Defendant’s Position
The Second Defendant, represented by Ms McDonald, sought permission to appeal on two grounds. Firstly, under CPR 52.6(1)(a), it was argued that the appeal would have a real prospect of success. The defendant contended that the judge failed to properly consider the Second Claimant’s failure to provide evidence explaining why she accepted a settlement sum significantly lower than her pleaded claim following the disclosure of surveillance evidence [§25(c)]. It was submitted that the judge erroneously reversed the burden of proof and neglected to consider proportionality-based reductions for costs incurred after the date the Claimant should have recovered, and for work on heads of loss (future losses and accommodation) for which no damages were ultimately recovered [§28].
Secondly, under CPR 52.6(1)(b), it was argued there was a compelling reason for the appeal to be heard. The defendant submitted that the judgment created a problematic juxtaposition, implying that defendants must take allegations of fundamental dishonesty to trial to secure a finding under section 57 of the Criminal Justice and Courts Act 2015, rather than seeking a conduct-based reduction under CPR 44.11 at the costs assessment stage [§25(b)]. It was suggested that guidance from an appellate court was needed on this point, with an anecdotal assertion that the Federation of Insurance Lawyers (FOIL) had an interest in the outcome [§15].
The Second Claimant’s Position
The Second Claimant, represented by Mr Mason, resisted the application. While his submissions are not detailed in the judgment, the court’s decision reflects that the Claimant’s position aligned with the judge’s reasoning: that the bill had already been substantially reduced, that the costs order agreed by the parties did not contain the limitations the defendant now sought, and that the assessment was not the correct forum to re-litigate substantive allegations that could and should have been pursued before the trial judge.
The Court’s Decision
Costs Judge Nagalingam dismissed the application for permission to appeal [§109]. Addressing the first ground, the judge held that the appeal would not have a real prospect of success. The court rejected the argument that it had failed to consider the Claimant’s lack of explanation for the settlement, noting that the settlement was a commercial agreement net of contributory negligence and that a party cannot be compelled to waive privilege concerning its reasons for settling [§105]. The judge also found no merit in the arguments regarding further proportionality reductions. He clarified that it was not open to him to retrospectively determine a date of full recovery or to assume that nil damages were recovered for specific heads of loss, as the global settlement sum was not apportioned [§67].
The judge emphasised that the purpose of a detailed assessment is not to hear arguments a party wished it had run but did not [§57]. He noted that the defendant could have sought an issues-based, time-limited, or percentage-based costs order when settling the case if it wished to protect its position, but it had agreed to a standard order for costs [§58-60]. The significant reductions already applied (a 44% reduction in time claimed for work on documents [§63]) were deemed sufficient to bring the costs to a proportionate level.
On the second ground, the judge found no “compelling reason” for an appeal. He firmly rejected the notion of a tension or “lacuna” between the fundamental dishonesty regime in section 57 of the 2015 Act and the general misconduct provision in CPR 44.11 [§77]. The judge reasoned that the two mechanisms serve distinct purposes: section 57 provides for the dismissal of a claim, a serious step requiring a trial, whereas CPR 44.11 allows for costs sanctions for a broad range of unreasonable or improper conduct [§78]. He found the defendant’s argument that the judgment would lead to a blocking of the courts with trials to be speculative and unsupported by any evidence, noting the absence of any formal interest from FOIL [§94-98].
Finally, the judge confirmed that he had properly considered and rejected the CPR 44.11 misconduct argument during the assessment, finding the threshold for a finding of unreasonable or improper conduct had not been met [§107]. Consequently, permission to appeal was refused. There was no order as to the costs of the permission hearing, as the respondent’s attendance was not directed by the court and the substantive costs of the assessment had already been agreed between the parties [§115].
CPR 44.11 | Claimant’s Costs Of £174,565.79 Reduced To Nil
Direct CPR 44.11 misconduct case with complete disallowance of costs for unreasonable behaviour
Allegations of misconduct and the court’s powers under CPR 44.11
Comprehensive analysis of CPR 44.11 powers and requirements for misconduct findings
CPR 44.11: Misconduct in detailed assessment proceedings
Court of Appeal authority on misconduct in detailed assessment with mis-certification issues
Recent 2025 High Court decision on CPR 44.11 threshold for misconduct
Fundamental dishonesty found on appeal by reason of material non disclosure
Court of Appeal case distinguishing fundamental dishonesty from general misconduct
Appeals from costs judges: Seeking permission to appeal
Procedural guidance on permission to appeal from costs judges under CPR 52.6
