Practice overview

John is a junior barrister specialising in commercial and business and property work. His practice spans commercial disputes, civil fraud and asset recovery, insolvency, company and trusts litigation, with a particular emphasis on high-value, multi-jurisdictional disputes involving allegations of dishonesty.

Since joining Chambers in September 2022, John has been instructed in some of the heaviest litigation before the English courts. He acted (led by Tim Penny KC) for two defendants to PIFSS v Al Wazzan & ors, a US$1.1bn Commercial Court bribery claim whose 40-week trial is said to be the longest in modern Commercial Court history (judgment awaited). He is currently instructed in Re Windward Prospects Ltd, defending a company’s former directors against a £150m claim for transactions at an undervalue and misfeasance now pursued by BAT Industries Plc, which is to be tried together with BAT’s related claim against S&W Partners LLP.

Alongside his led work in substantial litigation, John has a busy practice in his own right, appearing regularly as sole counsel in the High Court and County Court, including at trial. He is used to acting under pressure and at pace, whether as part of a large counsel team or alone, and strives to be commercial, responsive and easy to work with.

Before coming to the Bar, John completed an LLM at UCL, having previously undertaken the GDL and Bar Course at City, University of London. He also spent two years at EY in its Corporate Governance team, giving him insight into the issues that underpin much of his company and insolvency work. A linguist by background, John is proficient in Italian and Spanish.

 

Commercial disputes

John acts in a wide range of commercial disputes, from the very largest Commercial Court litigation to sole counsel trials and applications. He has particular experience of claims involving allegations of dishonesty, of banking and consumer credit disputes, and of matters raising issues of financial services regulation, including under FSMA and the FCA rules.

Recent cases include:

  • PIFSS v Al Wazzan & ors (judgment awaited): defending a US$1.1bn Commercial Court bribery claim on behalf of two defendants alleged to have paid US$110m in secret commissions. John was led by Tim Penny KC. The 40-week trial of this claim is said to be the longest trial in modern Commercial Court history.
  • Re Windward Prospects Ltd: defending the former directors of Windward Prospects Ltd against a £150m claim for transactions at an undervalue and misfeasance, originally brought by the company’s joint administrators and now pursued by BAT Industries Plc. Following the Court’s decision to case manage and try the claim against the directors together with BAT’s related claim against S&W Partners LLP, the trial is listed to be heard not before November 2027.
  • Lloyds Bank Plc v Spencer & anor: defending (led by Thomas Grant KC) a £4m claim on the basis that lending at excessive rates was procured by duress, intimidation and deceit, and in any event contained penalties and gave rise to an unfair relationship within the meaning of s.140A of the Consumer Credit Act 1974.
  • ABFA Commodities Trading Ltd v Petraco Oil Company SA [2024] EWHC 147 (Comm): defending (led by Alan Gourgey KC and Bobby Friedman KC) an application to enforce an undertaking in damages in respect of US$28.7m of losses suffered by a third party. In a novel area of law, the Court refused to exercise its discretion to enforce the undertaking in part on account of the applicant’s dishonesty.
  • Alsaady v Al Hamadani and six others: acting for the claimant in a complex US$30m partnership, breach of bailment and fraud claim in relation to various art, antiques and other chattels. John was led by Bobby Friedman KC in successfully obtaining a proprietary injunction, the appointment of a court receiver and a disclosure order.
  • International Medical Supplies Ltd v Decker and anor: acting (led by James Bailey KC) for the first defendant in a breach of warranty of authority claim for £10m.
  • Advising (led by Max Mallin KC) on a Financial List claim involving various regulatory breaches by the issuer of securities which resulted in the loss of the majority of their value.
  • Acting on a pre-action basis in a £34m debt claim by a father against his children, in circumstances where the children say that the sums were advanced as gifts.
  • Successfully acting for the claimant as sole counsel in Ratnam v Pearinpanathan, the trial of a claim for renewal of a business tenancy. A significant costs award was made in the claimant’s favour after obtaining a judgment more favourable than a Part 36 offer he had made.
  • Together with Daniel Lewis, advising on whether an entity required FCA authorisation for conducting controlled claims management activity or providing claims management services.
  • Acting in various trials of claims pursuant to the Consumer Credit Act 1974.
  • Advising on private rights of action pursuant to s.138D of the Financial Services and Markets Act 2000, and on whether a foreign market qualifies as an eligible market for the purposes of the FCA rules.
  • Advising the purchasers on means of recovery of an artwork stolen in transit, involving complex issues of jurisdiction, lex situs and insurance.
  • Acting, led by Jack Watson KC, for a claimant in an ongoing claim against an adviser’s firm.
  • A range of advisory work on issues including proper construction, rectification and breach of contract.

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    Events / Webinars

    Wilberforce Civil Fraud Conference 2026

    Tuesday 7 July 2026 | 1pm - 5.55pm, followed by drinks and canapés
    The View at Royal College of Surgeons, London

    £165 + VAT | 3.0 CPD

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    Publications

    Rules of the DIFC courts 2025

    Tom Roscoe | Jonathan Chew | Stephen Brown | Bobby Friedman KC | Simon Atkinson | Jessica Brooke | Tara Taylor | John Grocott-Barrett | Ernest Leung
    October 2025

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    News

    Nine Wilberforce barristers feature in three of The Lawyer’s Top 20 Cases of 2025

    We are delighted to announce that Wilberforce barristers appear in three of The Lawyer’s Top 20 cases of 2025, identifying the upcoming year’s most-talked-about disputes. Nine of our members are involved across the highlighted matters. The Public Institution For Social... Read more

    Monday 6 January 2025

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    Events / Webinars

    Wilberforce Civil Fraud Conference 2024

    Wednesday 6th November 2024 | 12.30pm - 5.55pm, followed by drinks and canapés
    The Westin London City

    £145 + VAT | 3.75 CPD

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Civil fraud and asset recovery

John is a core civil fraud and asset recovery practitioner. He has acted in claims involving bribery and secret commissions, deceit, duress and intimidation, breach of fiduciary duty and proprietary claims, and is experienced in the interim remedies that accompany such litigation, including proprietary injunctions, receivership orders, and Norwich Pharmacal and Bankers Trust relief.

Recent cases include:

  • PIFSS v Al Wazzan & ors (judgment awaited): defending a US$1.1bn bribery claim on behalf of two defendants alleged to have paid US$110m in secret commissions. John was led by Tim Penny KC. The 40-week trial of this claim is said to be the longest trial in modern Commercial Court history.
  • ABFA Commodities Trading Ltd v Petraco Oil Company SA [2024] EWHC 147 (Comm): defending (led by Alan Gourgey KC and Bobby Friedman KC) an application to enforce an undertaking in damages in respect of US$28.7m of losses suffered by a third party. In a novel area of law, the Court refused to exercise its discretion to enforce the undertaking in part on account of the applicant’s dishonesty.
  • Alsaady v Al Hamadani and six others: acting for the claimant in a complex US$30m partnership, breach of bailment and fraud claim in relation to various art, antiques and other chattels. John was led by Bobby Friedman KC in successfully obtaining a proprietary injunction, the appointment of a court receiver and a disclosure order.
  • Lloyds Bank Plc v Spencer & anor: defending (led by Thomas Grant KC) a £4m claim on the basis that lending at excessive rates was procured by duress, intimidation and deceit, and in any event contained penalties and gave rise to an unfair relationship within the meaning of s.140A of the Consumer Credit Act 1974.
  • Gertner & ors v Weinroth: acting (led by Fenner Moeran KC) for the respondents to an application made pursuant to a Bankers Trust order, contending that jurisdiction lay solely under the Evidence (Proceedings in Other Jurisdictions) Act 1975 and that the Israeli trust said to have arisen did not, properly characterised under English law, give rise to a proprietary interest.
  • International Medical Supplies Ltd v Decker and anor: acting (led by James Bailey KC) for the first defendant in a breach of warranty of authority claim for £10m.
  • Acting in a High Court application by the administrators of a company who suspected misfeasance for a Norwich Pharmacal / Bankers Trust.

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    Events / Webinars

    Wilberforce Civil Fraud Conference 2026

    Tuesday 7 July 2026 | 1pm - 5.55pm, followed by drinks and canapés
    The View at Royal College of Surgeons, London

    £165 + VAT | 3.0 CPD

    View more
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    Publications

    Rules of the DIFC courts 2025

    Tom Roscoe | Jonathan Chew | Stephen Brown | Bobby Friedman KC | Simon Atkinson | Jessica Brooke | Tara Taylor | John Grocott-Barrett | Ernest Leung
    October 2025

    View more
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    News

    Nine Wilberforce barristers feature in three of The Lawyer’s Top 20 Cases of 2025

    We are delighted to announce that Wilberforce barristers appear in three of The Lawyer’s Top 20 cases of 2025, identifying the upcoming year’s most-talked-about disputes. Nine of our members are involved across the highlighted matters. The Public Institution For Social... Read more

    Monday 6 January 2025

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    Events / Webinars

    Wilberforce Civil Fraud Conference 2024

    Wednesday 6th November 2024 | 12.30pm - 5.55pm, followed by drinks and canapés
    The Westin London City

    £145 + VAT | 3.75 CPD

    View more

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John's expertise

Download Insolvency CV

Insolvency

John acts for office holders, creditors, directors and companies across the full range of contentious insolvency work, from substantial claims against former directors to petitions, statutory demands and applications arising in administrations and bankruptcies.

Recent cases include:

  • Re Windward Prospects Ltd: defending the former directors of Windward Prospects Ltd against a £150m claim for transactions at an undervalue and misfeasance, originally brought by the company’s joint administrators and now pursued by BAT Industries Plc as assignee of the claims. Following the Court’s decision to case manage and try the claim against the directors together with BAT’s related claim against S&W Partners LLP, the trial is listed to be heard not before November 2027.
  • AIK v Prospect Business Centres (Monument) Ltd and anor: acting (led by John McGhee KC) in an application for leave to proceed against an insolvent company and possession pursuant to the Blue Jeans This case involved considering the ICC’s jurisdiction to order possession against an ostensible licensee who claimed to benefit from a lease.
  • Decker v International Medical Supplies Ltd: acting (led by James Bailey KC) for the applicant debtor in an application to set aside a statutory demand, successfully persuading the Court to adjourn the matter until such time as an application to set aside a default judgment is determined.
  • Acting in a High Court application by the administrators of a company who suspected misfeasance for a Norwich Pharmacal / Bankers Trust.
  • Acting for administrators in various applications to extend administrations.
  • Acting for petitioners, debtors and companies in complex bankruptcy and winding up petitions.
  • Advising and acting for a creditor responding to applications to set aside statutory demands made in respect of guarantors.
  • Applying for retrospective alternative service of documents in respect of a bankrupt who failed to attend a private examination after evading service.

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    Events / Webinars

    Wilberforce Insolvency Conference & Dinner 2026

    Thursday 26 March 2026 | 12.45pm - 5.50pm followed by drinks and dinner
    InterContinental Park Lane, London

    £145 - £195 (+ VAT) | 3.5 CPD

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    Publications

    Rules of the DIFC courts 2025

    Tom Roscoe | Jonathan Chew | Stephen Brown | Bobby Friedman KC | Simon Atkinson | Jessica Brooke | Tara Taylor | John Grocott-Barrett | Ernest Leung
    October 2025

    View more
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    News

    Nine Wilberforce barristers feature in three of The Lawyer’s Top 20 Cases of 2025

    We are delighted to announce that Wilberforce barristers appear in three of The Lawyer’s Top 20 cases of 2025, identifying the upcoming year’s most-talked-about disputes. Nine of our members are involved across the highlighted matters. The Public Institution For Social... Read more

    Monday 6 January 2025

    View more
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    Events / Webinars

    Wilberforce Civil Fraud Conference 2024

    Wednesday 6th November 2024 | 12.30pm - 5.55pm, followed by drinks and canapés
    The Westin London City

    £145 + VAT | 3.75 CPD

    View more

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John's expertise

Download Company law CV

Company law

John’s company practice encompasses claims for breach of directors’ duties, shareholder, joint venture and partnership disputes, unfair prejudice, and applications concerning company registers. It overlaps closely with his fraud and insolvency work, and draws on his pre-Bar experience of corporate governance at EY.

Recent cases include:

  • Re Windward Prospects Ltd: defending the former directors of Windward Prospects Ltd against a £150m claim for misfeasance and transactions at an undervalue, now pursued by BAT Industries Plc and listed for trial (together with BAT’s related claim against S&W Partners LLP) not before November 2027.
  • Alsaady v Al Hamadani and six others: acting for the claimant in a complex US$30m partnership, breach of bailment and fraud claim in relation to various art, antiques and other chattels. John was led by Bobby Friedman KC in successfully obtaining a proprietary injunction, the appointment of a court receiver and a disclosure order.
  • Successfully applying for, and separately successfully resisting, the rectification of company registers.
  • Acting in and drafting an intended unfair prejudice petition.
  • Acting for a neutral company in unfair prejudice proceedings.
  • Advising on whether a shareholders’ agreement could be relied on in effect to obtain unfair prejudice relief from the Courts in England, notwithstanding the company being incorporated in Gibraltar.
  • Advising on whether a director was entitled to represent a company at trial.

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    Publications

    Rules of the DIFC courts 2025

    Tom Roscoe | Jonathan Chew | Stephen Brown | Bobby Friedman KC | Simon Atkinson | Jessica Brooke | Tara Taylor | John Grocott-Barrett | Ernest Leung
    October 2025

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    Articles

    A Nigerian tragedy: how to set aside a US$11 billion arbitral award

    John Grocott-Barrett and Ernest Leung have written an article for TL4’s FIRE Starters magazine on ‘A Nigerian tragedy: how to set aside a US$11 billion arbitral award’, where they analyse Federal Republic of Nigeria v Process and Industrial Developments Limited.... Read more

    By John Grocott-Barrett | Ernest Leung
    Monday 4 March 2024

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Trusts, probate and estates: contentious

John acts and advises in contentious trusts matters, both domestic and cross-border, often where trusts issues intersect with fraud, asset recovery or co-ownership disputes. He has written on equitable co-ownership in Wilberforce’s Private Client eBriefing.

Recent cases include:

  • Gertner & ors v Weinroth: acting (led by Fenner Moeran KC) for the respondents to an application made pursuant to a Bankers Trust order, contending that jurisdiction lay solely under the Evidence (Proceedings in Other Jurisdictions) Act 1975 and that the Israeli trust said to have arisen did not, properly characterised under English law, give rise to a proprietary interest.
  • Solomon & ors v Charles & anor: acting for the claimants as sole counsel in a 2.5 day trial of a claim for a declaration and accounts in respect of rental proceeds received over a 40 year period, arguing that a beneficial joint tenancy had been severed by a course of dealings prior to the deceased’s passing.
  • Acting (led by Clare Stanley KC) for the respondent settlor in an application for directions by the trustee.
  • Assisting a trustee in complying with a Norwich Pharmacal / Bankers Trust.
  • Assisting in a matter concerning real evidence in a complex cross-jurisdictional trusts dispute.

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    Articles

    Pieces of paper: Teixeira v Moaven and the new landscape at the private client/fraud border

    Article by John Grocott-Barrett, 4 August 2026 To read or download this article  as a PDF, please click here. When property is fought over, it is not unusual for a document to surface which purports to answer the question of beneficial ownership... Read more

    By John Grocott-Barrett
    Tuesday 4 August 2026

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    Publications

    Rules of the DIFC courts 2025

    Tom Roscoe | Jonathan Chew | Stephen Brown | Bobby Friedman KC | Simon Atkinson | Jessica Brooke | Tara Taylor | John Grocott-Barrett | Ernest Leung
    October 2025

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    Events / Webinars

    Wilberforce Trusts Litigation Day 2025

    Monday 20 January 2025 | 9am - 6pm, followed by drinks and dinner
    InterContinental Park Lane, London

    £299 - £360 + VAT | 5.5 CPD CPD

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    Events / Webinars

    Wilberforce Civil Fraud Conference 2024

    Wednesday 6th November 2024 | 12.30pm - 5.55pm, followed by drinks and canapés
    The Westin London City

    £145 + VAT | 3.75 CPD

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John's Details

BSB/VAT information

Registered name: Mr John Grocott-Barrett
VAT number: 429676354

Privacy Notice pdf

Qualifications and Appointments

  • LLM in International Commercial Law, UCL (Distinction)
  • GDL, City, University of London (Distinction)
  • BA in Modern Languages, Durham University (First Class Honours, top of year in Hispanic Studies department)
  • BPTC LLM in Legal Practice, City, University of London
  • Diploma de español DELE nivel C1 (effective operational proficiency in Spanish), Instituto Cervantes

Awards:

  • Denning Scholarship, Lincoln’s Inn
  • Haldane Scholarship, Lincoln’s Inn
  • Postgraduate Scholarship, City, University of London
  • A W Goodbody Prize for best paper in Financial Decision-Making, The Chartered Governance Institute
  • Hispanic Studies Prize for highest overall mark in department, Durham University
  • Distinction in Spoken Spanish, Durham University
  • Distinction in Spoken Italian, Durham University

Memberships

  • COMBAR
  • Chancery Bar Association
  • Contentious Trusts Association (ConTrA)

Publications

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