The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

Stewarts Law LLP

Work 020 7822 8000
Fax 020 7822 8037
Leeds, London

Ian Gatt

Work +44 (0)20 7822 8147
Stewarts Law LLP

Work Department

Commercial LitigationFraudCompetition LitigationInternational Arbitration and Employment




Ian’s expertise spans high value commercial, fraud (both criminal and civil), and employment disputes in the UK, Middle East and Asia. In the course of his career he has acted for a wide range of companies, financial institutions and individuals involved in domestic and international litigation and arbitration. Ian has also prosecuted several cases for the Serious Fraud Office.


Ian was previously Head of Advocacy at Herbert Smith Freehills, a team he founded in 2005. Prior to this, Ian was a barrister at Littleton Chambers. He studied Law at Hertford College, Oxford graduating with a first class degree.


Ian is an accredited mediator and has acted in over 100 mediation disputes. From 2000 to 2017 he sat as a Recorder.

London: Crime, fraud and licensing

Fraud: civil

Within: Fraud: civil

Stewarts Law LLP¬†advises on large-scale civil fraud matters with cross-border aspects. The firm is advising RAKIA, which invests the sovereign wealth of Ras Al Khaimah; in a fraud case against a former CEO and other individuals valued at $1.5b. It also continues to act for the liquidators of Kaupthing in connection with a ‚ā¨500m claim against Deutsche Bank which related to the sale of banking derivatives during the credit crunch. Clive Zietman¬†heads the team, he is supported by the ‚Äėimpressive‚Äô Sean Upson¬†who ‚Äėtypically identifies very quickly the available courses of action and then provides prompt and reliable advice as to which option is most feasible and appropriate‚Äô. Ian Gatt¬†QC joined as partner from Herbert Smith Freehills LLP¬†and David Hughes¬†joined as partner from Dechert LLP. Laura Jenkins¬†and Lucy Ward¬†were promoted to partner. Daniel Loblowitz¬†and Fiona Stewart¬†left the firm.

[back to top]

London: Dispute resolution

Banking litigation: investment and retail

Within: Banking litigation: investment and retail

'A top firm for claimants and highly recommended for banking litigation', the 'smart and user-friendly' conflict-free firm¬†Stewarts Law LLP¬†is the largest litigation-only law firm in the UK and acts for some of the world‚Äôs biggest financial institutions, companies, multinational corporations and high-net-worth individuals; the team has also expanded into new areas of disputes work, such as securities litigation. The practice acts in complex, large-scale and high-value banking disputes and has significant experience of litigation funding; and the civil fraud group's work often involves complex financial instruments and structures. In a high-value, complex matter involving multiple jurisdictions, it acted for the liquidators of Kaupthing in connection with a ‚ā¨500m claim against Deutsche Bank, which arose from the sale of complex banking derivatives; and in¬†a dispute that raised fundamental questions about the duties of banks that issue Islamic corporate bonds, the team acted for both hedge funds that bought a bond and the company that issued the bond. ¬†Clive Zietman¬†is department head,¬† Marc Jones¬†'runs litigation very well', and Fiona Gillett¬†is 'a¬†very able lawyer, who has a great touch with clients'. Other key advisers are¬†¬†Sean Upson,¬†Keith Thomas,¬†Paul Brehony,¬†Ian Gatt QC¬†and¬†David Hughes¬†. Lucy Ward¬†and Laura Jenkins¬†were promoted to the partnership.¬†Elaina Bailes¬†is a key senior associate.

[back to top]

Commercial litigation

Within: Commercial litigation

Stewarts Law LLP is the largest litigation-only law firm in the UK and one of the few firms able to accept instructions against banks and financial institutions as well as other major corporates. It 'provides an excellent service with able lawyers, who are ready to drop everything and get up to speed at short notice when necessary'. The practice acted for 112 institutional investors, as claimants, in seeking damages further to Tesco's admission that its earlier financial statements were overstated by at least £326m as a result of manipulation of its commercial income; the case is one of the first cases to be brought under new legislation that is designed to address serious corporate mis-statements in published statements.Clive Zietman heads the commercial litigation department and the 'ultra-responsive' Ian Gatt QC 'has a good understanding of clients' priorities'. Other highly rated advisers include Marc Jones, Fiona Gillett, Keith Thomas, Sean Upson, Paul Brehony and Andrew Hill. David Hughes was recruited from Dechert LLP, while Fiona Stewart left the firm.

[back to top]

Competition litigation

Within: Competition litigation

Stewarts Law LLP is 'one of the leading competition damages firms in the field' and its team is particularly noted for the 'steel determination' with which it manages large pieces of litigation for claimants pursuing damages arising from cartel infringements and abuses of dominance. The team is co-led by 'excellent strategist' Kate Pollock and 'resourceful' Kenny Henderson, who has vast cross-sectoral experience in competition disputes. Ian Gatt QC is recommended as 'a very far-sighted thinker'. The group represented multiple claimants, including Arcadia Group, Asda, Next and B&Q , in separate actions against Visa Europe and Visa concerning interchange fees. It also represented iiyama in separate claims against Schott and Samsung Electronics regarding CRT and LCT panel cartels respectively; in cases currently pending trial. The 'meticulous' Inge Forster is another key contact with 'good procedural knowledge'.

[back to top]

International arbitration

Within: International arbitration

'A boutique firm that regularly outguns its larger competitors', Stewarts Law LLP provides a largely conflict-free service in commercial arbitration matters to clients across the Americas, Europe, the Middle East and Africa; and the practice's sector specialisms include energy and power projects, cross-border trade and investment, and defence. International arbitration department head Philippa Charles is 'super-intelligent, has flawless tactical nous and is an ever- popular choice both as counsel and arbitrator'. Ian Gatt QC is 'a superb lawyer who contributes immensely to a case's successful outcome'. Matthew Knowles is also highly rated, and associate Veronica Connolly is 'an excellent attorney, well versed in the applicable law and very capable and competent'. Al Trent relocated to Jamaica.

[back to top]

Back to index

Legal Developments in London

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to
  • The legal difference between a consultant and an employee according to Nicaraguan Law

    Knowing the legal difference between a consultant and an employee is important for a company that needs to hire someone in Nicaragua or for a person interested in rendering services for a company or another person, due to the fact that the nature of the contractual relationship will determine many factors that both parties must be aware of before executing the contracting modality that will govern the relationship between them - the nature of the contractual relationship impacts on the employment benefits, tax implications and liabilities that the parties must comply with according to the law.  labor_law_in_nicaragua
  • Single director - shareholder Companies according to the Nicaraguan legal system

    What is a Single Shareholder and Director legal entity?
  • Business in Nicaragua- The Most Important Changes in the Recent Tax Reform

    In recent years, the country ŐĀs the government has been committed to improving Taxation in Nicaragua and attempting to follow the legislative model used by some of the other countries in the region. Starting January 1st, 2013, a new tax law (Law No. 822, Tax Concertation Law) came into force in and completely changed the taxation system in Nicaragua. Two years later a new law was issued by the National Assembly containing more than 80 amendments, additions and repeals (Law No 891) which came into force December 18th, 2014.