Background
Martina Yvonne Shand brought proceedings against Mishcon De Reya LLP arising from its handling of earlier litigation concerning her property. She had previously sued Mishcon in 2019 for negligence, breach of fiduciary duty, deceit, and conspiracy. Part of that case was discontinued, while the remainder was settled after she accepted a Part 36 offer in January 2021 and received compensation for Mishcon’s admitted negligence.
After commencing the present action in September 2025, Shand sought to recast her case around an alleged undisclosed own-interest conflict. She relied on publicly available material showing that a Mishcon partner had participated in property-industry events connected with Tony Pidgley, who chaired the Berkeley Group and was a director of the landlord involved in Shand’s earlier litigation. Shand alleged that Mishcon’s commercial interest in cultivating that relationship placed pressure on the solicitor handling her case and led to its deliberate mishandling.
The Court’s Holding
Mr Justice Cotter formally disallowed the amendments Shand had made without permission, dismissed her application for permission to make further amendments, and struck out the unamended claim. The claim was an abuse of process under CPR 3.4(2)(b) because the new conflict theory could and should have been advanced in the 2019 proceedings. Allowing it now would offend the finality principle in Henderson v Henderson and unjustly harass or oppress Mishcon.
The court also held that the claim disclosed no reasonable grounds under CPR 3.4(2)(a). Mishcon’s public business-development activity did not realistically support an inference that the firm’s commercial interests caused the solicitor to sabotage Shand’s case. The alleged causal connection was fanciful and had no prospect of success. Independently, the claim was statute-barred: any breach ended by May 2016, the primary limitation period expired by 1 June 2022, and the publicly available information did not establish deliberate concealment postponing limitation under section 32 of the Limitation Act 1980. The court declared the claim totally without merit.
Key Takeaways
- A party cannot evade litigation finality by repackaging matters that could and should have been advanced in an earlier action resolved through discontinuance and settlement.
- A court may strike out a factually hopeless or fanciful claim where the pleaded inference is unrealistic, although such a determination at the pleading stage is unusual.
- Publicly promoted professional networking and marketing activity did not, without more, support the alleged own-interest conflict or deliberate concealment for limitation purposes.
Why It Matters
The decision illustrates the broad, merits-based approach to abuse of process when a claimant advances a new legal theory after earlier litigation concerning the same underlying loss. Settlement rather than judgment does not prevent the court from applying the principle of finality.
It also shows that ordinary, public business-development contacts do not themselves establish a solicitor’s own-interest conflict or a plausible causal link to negligent case handling. Costs remained to be determined after written submissions, and the time for appeal was postponed until entry of the final order.