89 Holland Park v Dell — Allowed claims to proceed on alternative contractual and unjust enrichment bases; struck out estoppel claim as abusive

Case
89 Holland Park (Management) Limited v Andrew Lawson Dell & Jennifer Simone Dell
Court
High Court of Justice, Chancery Division (United Kingdom)
Date Decided
3 July 2026
Citation
[2026] EWHC 1624 (Ch)
Topics
Service charges; Collateral contracts; Estoppel; Unjust enrichment; Abuse of process
Source
Read the full opinion

Background

89 Holland Park is a Victorian villa divided into flats. The freeholder is a management company (Manco) owned by leaseholders, including the Dells. A neighboring property owner, architect Sophie Hicks, proposed major redevelopment plans that residents opposed. Manco incurred approximately £2.7 million in legal and professional costs defending the building’s interests through three separate pieces of litigation against Hicks. Manco sought to recover these costs from leaseholders via service charges under the lease.

The Dells refused to pay approximately £430,411 of the disputed costs after July 2014. The First-tier Tribunal found the costs were recoverable as service charges, but the Upper Tribunal reversed that finding. The Court of Appeal affirmed that the costs were not recoverable under the lease’s service charge provisions. Following that defeat, Manco commenced new proceedings against the Dells, pleading alternative bases for recovery: (1) a collateral contract outside the lease; (2) estoppel; and (3) unjust enrichment.

The Dells applied to strike out Manco’s claim on various grounds, including abuse of process. Master McQuail considered whether the alternative claims could proceed or should be dismissed summarily.

The Court’s Holding

Master McQuail refused to strike out Manco’s primary contractual claim and alternative contractual claim. The court found that the issues of offer, acceptance, consideration, and intention to create legal relations are inherently fact-sensitive and require evaluation of the parties’ communications and conduct over time. Although the earlier proceedings concerned service charge recoverability under the lease, that did not preclude the existence of a separate collateral agreement. The court emphasized that the Court of Appeal’s decision on service charges did not determine whether the Dells might be liable on a different legal basis, a possibility the Upper Tribunal had expressly recognized. The court required Manco to amend its pleading to provide more detailed chronology of any alleged agreement, including its formation, terms, and any variations or terminations.

The court struck out the estoppel claim as an abuse of process. The essence of the estoppel claim was to achieve indirectly what Manco had failed to achieve directly—treating the costs as recoverable through service charges. Permitting that claim to proceed would risk undermining the Court of Appeal’s final determination. Additionally, the estoppel argument could and should have been pursued in the earlier tribunal proceedings; raising it now fell within the Henderson v Henderson principle against re-litigation. The court also found the estoppel pleading lacked necessary clarity regarding reliance and detriment.

The court refused to strike out the unjust enrichment claim. Although demonstrating enrichment, its monetary valuation, and the unjustness of retention present substantial hurdles, these are fact-sensitive questions unsuitable for summary disposal. The court required amended pleading to clarify Manco’s case on enrichment, its measurement, and why retention would be unjust. Importantly, the court rejected the argument that the existence of the lease necessarily excludes a restitutionary claim in all circumstances.

Key Takeaways

  • A collateral contract outside a lease’s formal provisions may exist despite earlier proceedings treating sums as service charges, and such a claim is not necessarily an abuse of process merely because earlier litigation concerned contractual recovery under the lease itself.
  • Estoppel claims may be struck out as abusive where they seek to achieve indirectly what failed litigation attempted directly, particularly when the point could have been pursued earlier but was not.
  • Unjust enrichment claims can proceed despite a contractual relationship between parties if the contract does not directly address the costs in question and the claimant can establish enrichment, measurable benefit, and unjustness.
  • Pleadings alleging collateral agreements and unjust enrichment must provide sufficient particularity regarding formation, terms, consideration, enrichment, and valuation to survive threshold dismissal.

Why It Matters

This decision clarifies the boundaries of abuse of process doctrine in multi-stage litigation. While courts protect finality by striking down attempts to re-litigate settled issues, they recognize that parties may pursue alternative legal theories that were not directly adjudicated even if earlier proceedings touched related facts. The decision permits Manco to pursue a collateral contract theory distinct from the lease’s service charge mechanism, which may have significant implications for management companies funding building-wide disputes and for the enforceability of informal cost-sharing agreements among leaseholders.

The court’s refusal to categorically exclude unjust enrichment claims merely because a contractual regime exists between the parties is also noteworthy. It suggests that where statutory schemes (like service charges under the Landlord and Tenant Act 1985) fail to provide a remedy, restitutionary law may fill the gap, subject to proof of enrichment and unjustness. This may influence how building disputes are funded and resolved in future cases.

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