The Senior Courts Costs Office’s decision in Hyder v Aidat-Sarran [2024] EWHC 3686 (SCCO) establishes that solicitors bear full vicarious responsibility for costs draftsmen’s failures and cannot avoid severe sanctions by blaming their agents when bills contain egregious, persistent, and unrectified defects.
Background
The matter concerned detailed assessment proceedings in the Senior Courts Costs Office before Deputy Costs Judge Roy KC. The substantive litigation between the parties had concluded, and the claimant, Rashid Hyder, was seeking to recover his costs. The procedural history was marked by difficulties with the service of a compliant bill of costs by the claimant. An unless order was made requiring service of the bill by a specified date. The claimant served a bill one day after the deadline, and this bill was found to contain multiple and significant defects. The defendants, Robert Aidat-Sarran and Humwattie Aidat-Sarran, raised these defects in points of dispute served in response to the bill. The claimant then served a second, electronic bill, which not only failed to rectify the serious problems with the paper bill but added further defects. This led to the defendants making an application to strike out the claim for costs pursuant to CPR 44.11. The claimant, in turn, made an application for relief from sanctions for the late service of the initial bill.
Costs Issues Before the Court
The court was required to determine two distinct but related applications. The first was the claimant’s application for relief from sanction under CPR 3.9 for the late service of his bill of costs. The second was the defendants’ application under CPR 44.11 for the court to disallow all or part of the costs, seeking the draconian sanction of striking out the bill entirely due to the claimant’s multiple and serious failures in the preparation and service of both the original and the subsequent bill.
The Parties’ Positions
The claimant sought relief from sanction, arguing that the breach—serving the bill one day late—was neither serious nor significant when considered in isolation. It was submitted that the service of the bill, albeit defective, constituted belated compliance with the unless order. On the defendants’ application, the claimant accepted there were defects but argued that strikeout was a disproportionately severe sanction. The claimant’s counsel offered an apology for the failures at the hearing, although this came only at around midday on the day of the hearing itself.
The defendants opposed relief from sanction, contending that the bill was so seriously defective that its service could not be considered compliance with the order at all. On their own application, the defendants argued that the multiple, egregious, and persistent defects in both bills, coupled with a complete failure to address or rectify them even after they were highlighted in the points of dispute, amounted to unreasonable or improper conduct warranting the bill being struck out in its entirety. They submitted that the court could have no confidence in any future bill served by the claimant. The defendants’ witness statement of 22 August 2024 had clearly set out all these failings.
The Court’s Decision
The court granted the claimant’s application for relief from sanction. Applying the first stage of the Denton test, Deputy Costs Judge Roy KC found that the breach of the unless order was the one-day delay in service. The service of a defective bill was held to constitute belated compliance with the order, which only required “service of a bill.” The judge distinguished the situation from cases where a served document is “gibberish” or blank, citing CNM Estates (Tolworth Tower) Limited v Carvill-Biggs [2023] EWCA Civ 480. Consequently, the one-day delay was not serious or significant, and relief was granted.
On the defendants’ application under CPR 44.11, the court found that the claimant’s conduct met the threshold for the rule to be engaged. The judge made seven key findings at paragraphs 10-20 of the judgment:
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- First, the original bill contained multiple significant failures which the judge described as “egregious” when viewed in the round.
- Second, none of these defects were rectified in the second bill, the electronic bill, which the judge found “absolutely astonishing.”
- Third, the second bill not only failed to rectify the serious problems with the paper bill but added further defects, which was “even more astonishing” given that the need to ensure a defect-free bill had been clearly flagged in the points of dispute.
- Fourth, all these failings were clearly set out in the defendants’ witness statement of 22 August 2024. Fifth, the claimant’s solicitors displayed a “serious and troubling lack of insight and contrition” by failing to address the defects, serve any evidence, or even acknowledge these failings before the hearing, with an apology only coming via counsel at around midday on the hearing day itself.
- Sixth, the judge found it was not open to the claimant’s solicitor to blame the costs draftsman. As a matter of law under Gempride v Bamrah [2018] EWCA Civ 1367, the costs draftsman is the solicitor’s agent and the solicitor is vicariously responsible for all the costs draftsman’s failings as if the solicitor had performed the work themselves. In any event, there had been serious direct failings on the solicitor’s part: solicitors must apply superintendence and oversight to what a costs draftsman does, and the defects here were so obvious that the solicitor should have identified them; the solicitor should have been proactive to ensure compliance in time and properly; some failings, such as failures to certify, were purely those of the solicitor and were very basic; and by 22 August 2024 at the latest, in light of the defendants’ statement, the solicitors could not have had any basis to place reliance upon the costs draftsman, yet the compounding failures continued.
- Seventh, the judge was satisfied that both limbs of CPR 44.11(a) and (b) were met: there had been non-compliance with the rules, and there had been unreasonable conduct, meaning conduct which does not admit a reasonable explanation. In summary, the judge found there had been “multiple compound breaches” that were “serious”, “persistent”, “unexplained”, and “inexcusable.”
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While not making a positive finding of improper conduct without “the full picture,” the judge noted at paragraph 19 that serving an unchecked bill without caveat came “very close” to improper conduct and was at least arguably reckless as to the possibility of the court or defendant being misled.
Despite the seriousness of the conduct, the court declined to strike out the bill. The judge held that strikeout was the most draconian sanction and that a judge should always give “very anxious consideration” to whether any lesser sanction could properly meet the justice of the case. On a “very narrow balance,” the court was persuaded that lesser sanctions were appropriate. The court noted that in Gempride itself, despite serious misconduct, there was a substantial reduction but the bill was not struck out entirely, and this precedent tended to point against strikeout being appropriate in this case. The court also considered that the concerns about proportionality and confidence in any redrawn bill could be addressed by the orders it proposed to make.
Instead, the court imposed a severe costs sanction, disallowing 75% of the claimant’s assessed costs under CPR 44.11. This meant that whatever sum the bill was ultimately assessed at on detailed assessment, the claimant would recover only 25% of that total assessed sum. The judge described this as a “stern sanction by CPR 44.11 standards” but remained of the view that it was appropriate, noting that the claimant and his solicitors could “consider themselves quite fortunate that the bill is not struck out entirely.”
The court also disallowed interest on the claimant’s costs from 30 July until whatever date it was agreed the redrawn bill should be served by. The judge’s initial inclination had been to disallow all interest, but this was rejected as it would amount to double jeopardy in circumstances where 75% of the costs had already been disallowed.

Allegations of misconduct and the court’s powers under CPR 44.11
CPR 44.11 | Claimant’s Costs Of £174,565.79 Reduced To Nil
CPR 44.11: Misconduct in detailed assessment proceedings
Solicitor’s Costs Budget Figure Does Not Inherently Constitute Misleading Conduct Under CPR 44.11
Opportunistic Conduct Detailed Assessment CPR 3.9 | Long v Value
CPR 47.12 | Setting Aside A Default Costs Certificate | Application Denied




















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