The High Court’s decision in KXO and OYW v Devon County Council [2026] EWHC 203 (Admin) confirms that discontinuance of a judicial review claim triggers full costs liability under CPR 38.6, not merely costs limited to the Mount Cook stage.
Background
The claim was a judicial review brought on behalf of two children, KXO and OYW, by their mother, SZO, acting as their litigation friend. The Claimants challenged decisions made by Devon County Council on 25 May 2023 to propose amendments to their Education, Health and Care Plans (EHCPs) under regulation 28 of the Special Educational Needs and Disability Regulations 2014. The Claimants contended the Council acted unlawfully by amending the plans outside a formal review process. The Council maintained the decisions were lawful, provisional, and that an adequate alternative remedy existed via a statutory appeal to the Special Educational Needs and Disability Tribunal.
The procedural history was protracted and marked by considerable difficulties. The claim was issued on 30 May 2023 without a pre-action letter, in breach of the Pre-Action Protocol for Judicial Review. An application for interim relief was refused following a hearing on 8 June 2023 before DHCJ Mathew Gullick KC. The litigation friend, a disabled litigant in person diagnosed with Autism, ADHD, Agoraphobia and partial deafness, subsequently engaged in a pattern of conduct that included filing then withdrawing applications to discontinue the claim, making repeated complaints about an alleged failure to provide reasonable adjustments, failing to respond to court enquiries, and making applications that were certified as totally without merit. The court had, on multiple occasions, directed special measures to facilitate her participation, including remote attendance, permission for a supporter, and regular breaks.
On 5 January 2026, the litigation friend filed and served a Notice of Discontinuance. The court listed a hearing to determine, amongst other things, whether court permission or approval was needed for the discontinuance under CPR 38 or CPR 21.10 and to deal with costs. At the hearing on 3 February 2026, the litigation friend did not attend, although the hearing was available by CVP with the special measures previously directed. The court found that the Notice of Discontinuance was valid and had effectively ended the claim on 5 January 2026. Court approval was not required under CPR 21.10 because the discontinuance was unilateral and did not constitute the settlement or compromise of the claim. The only remaining issue was the liability for costs.
Costs Issues Before the Court
The primary costs issue was the financial consequence of the Claimants’ discontinuance. The general rule under CPR 38.6(1) is that a claimant who discontinues is liable for the defendant’s costs incurred up to the date of discontinuance, unless the court orders otherwise. The court needed to determine whether this default rule should apply. A related question was whether any costs award should be limited to the acknowledgment of service and summary grounds stage on a Mount Cook basis, or whether the full costs of the proceedings were recoverable. A secondary issue was the personal liability of the litigation friend for any costs order made against the child Claimants, governed by CPR 21.12.
The Parties’ Positions
The Defendant’s Position: The Council observed that by filing the Notice of Discontinuance, the Claimant had triggered liability for the Defendant’s costs under CPR 38.6(1). The Defendant made no positive application for costs but noted that the Claimant had made no application to reverse the general rule. The Defendant accepted that, given the litigation friend’s personal circumstances, any costs order should not be enforceable without the court’s permission.
The Claimants’ Position: The litigation friend did not attend the hearing and made no formal submissions on costs. In her witness statement dated 5 January 2026, she acknowledged that the Defendant’s costs were “highly likely to be passed on to me by way of a costs order.” No application was made to demonstrate a good reason for departing from the CPR 38.6 default rule.
The Court’s Decision
The court ordered that the Claimants, and therefore the litigation friend, pay all the Defendant’s costs of the proceedings — not simply the cost of preparing the acknowledgment of service and summary grounds on a Mount Cook basis — to be assessed if not agreed. The order was not to be enforced without the court’s leave.
In reaching this decision, the court applied the clear terms of CPR 38.6(1). As the Claimants had discontinued and had made no application to displace the general rule, it applied. The court had regard to the fact that the litigation friend was unrepresented and disabled, and the need to make reasonable adjustments to ensure fairness. However, it found that being a litigant in person does not exempt a party from compliance with the Civil Procedure Rules and Practice Directions, citing the Administrative Court Guide 2025 at paragraph 4.2.1. The court was satisfied that the litigation friend must be taken to be aware of the costs consequences of discontinuing under CPR 38.6, noting the Administrative Court Guide is designed to be accessible to litigants in person.
On the issue of personal liability, the court referred to CPR 21.12 and the certificate of suitability of litigation friend signed on 30 May 2023. This certificate contained an undertaking in the following terms: “I undertake to pay any costs which the above named claimant may be ordered to pay in these proceedings subject to any right I may have to be repaid from the assets of the claimant.” The court held that the litigation friend must be taken to be aware of her personal liability, a point she herself had acknowledged in her 5 January 2026 statement.
The court expressly declined to limit recovery to the Mount Cook basis, ordering all of the Defendant’s costs pursuant to CPR 38.6(1) and noting that no application had been made to displace the default rule. The judgment separately records a protracted procedural history involving multiple interlocutory applications, directions hearings, and the Defendant’s attendance at the final hearing by counsel — context which underscores why the costs exposure following discontinuance extended well beyond the acknowledgment of service stage.
Finally, the court recorded — though it was not in a position to act upon it — that had it retained jurisdiction, it would have refused permission to apply for judicial review and dismissed the claim as totally without merit. The court found the Claimants had an adequate alternative remedy by way of statutory appeal to the SENDisT. The court further indicated it would have been strongly inclined to refer the matter for consideration of a general civil restraint order, but was precluded from doing so by the valid discontinuance. By virtue of CPR 38.7, the Claimants will not be permitted to bring another claim arising from the same or similar facts without the court’s permission.

Part 36 Offers Cannot Displace The Solicitors Act One-Fifth Costs Rule
Does Removal As Trustee Always Mean Loss Of Indemnity?
Unless Order Stands | Defendants Fail To Evidence Impecuniosity After Non-Payment Of Interim Costs
“Extraordinarily High” Costs With “Paucity Of Information” Result In £43 Million Payment On Account















