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London

Founded in 2012, Signature Litigation has grown into one of London’s pre-eminent specialist dispute resolution practices. From the outset, we set out to do things differently: a conflict-free, disputes-only platform designed to give clients the undivided focus and strategic agility that complex, high-stakes matters demand.

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Gibraltar

Established in 2017, Signature Litigation's Gibraltar office was founded to address growing demand for specialist expertise in commercial litigation and private wealth disputes on the Rock.

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Paris

Signature Litigation AARPI houses one of France’s most enviable product liability practices, with the team also handling commercial and corporate litigation, insurance and reinsurance, toxic tort and ESG, civil fraud and asset tracing, international arbitration, administrative and public law.

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Frankfurt

Frankfurt has emerged as one of Europe's foremost financial and commercial centres and, increasingly, as a bridge between European and Asian markets. With that growth comes an increasing demand for sophisticated dispute resolution. Signature Litigation established its Frankfurt office to meet this need, bringing our conflict-free, disputes-only platform to the German market.

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Mark Beardsworth

Partner

In his own words:
In his own words:

“Mark is a very good lawyer. He is hands-on and very empathetic with clients.”

– Chambers UK 2026

“Mark has a depth of experience that few in the space have.”

– Chambers UK 2026

“Mark is an exceptional lawyer.”

– Chambers UK 2026

“Mark is an excellent lawyer with a proven track record of successfully managing international cases across multiple jurisdictions.”

– Chambers UK 2026

“He demonstrates a strong understanding of his clients’ needs, identifies areas of opportunity to add value and delivers high-quality legal advice.”

– Chambers UK 2026

“He’s very good to co-counsel with and is very collaborative.”

– Chambers UK 2025

“He’s a very established and hugely well-respected financial lawyer.”

– Chambers UK 2025

“He is very adept in multi-jurisdictional matters.”

– Chambers UK 2025

Mark is a Partner at our London office specialising in investigations and white collar crime.

Mark has a 25-year track record of successful representations of individuals and corporates in many major Serious Fraud Office investigations, including IKEA, BAE Systems, Rolls Royce, LIBOR/EURIBOR, Forex, Independent Insurance, G4S Serco, Sweett Group, Barclays Qatar and Tysers Integro. He has also advised clients in relation to major prosecutions brought by the Financial Conduct Authority, HM Revenue and Customs, and the Financial Reporting Council.

Mark has very significant experience in conducting corporate internal investigations for clients that operate across a range of industries including financial services, education, energy and infrastructure and sports and retail. He advises corporates on governance, compliance, management systems and controls, as well as on implementing policies. Mark also advises in relation to risk and governance during key corporate events including M&A and distressed situations.

Much of his work involves clients facing scrutiny internationally and in complex “parallel proceedings” involving civil and regulatory litigation.

Mark has been ranked in the leading legal directories for white collar crime for over 15 years. He is a recognised expert for both individuals and corporates and is Band 1 ranked in the Chambers UK 2026 Guide for Financial Crime: Individuals, where he is described as an “excellent lawyer with a proven track record of successfully managing international cases across multiple jurisdictions.” He is also praised for being a “personable, well connected and a brilliant lawyer.” In the 2024 Chambers High Net Worth Guide, Mark is ranked for Financial Crime: High Net Worth Individuals – the Guide notes he is “experienced in acting for high-net-worth clients under investigation and facing allegations of financial crime.” In The Legal 500 UK 2026 Guide, Mark is ranked as a Leading Partner for both Fraud: White Collar Crime and Regulatory Investigations and Corporate Crime.

Mark is Chair of the American Bar Association (ABA) International White Collar Crime Committee, the first non-American citizen to hold such a post, and he is an honorary member of AIJA, The International association of Young Lawyers having served on their Executive for many years.

He is also the author and Editor of numerous books and articles including the successful ABA Publication “An International Guide to Corporate Internal Investigations”.

Investigations and White-Collar Crime

  • Advising a world-leading education institution in relation to a historic multi-year investigation.
  • Representing a major international manufacturer during a corporate internal investigation.
  • Advising the directors and owners of an investment company accused of fraud in the litigation funding sector.
  • Advising a senior individual in relation to a global antitrust investigation.
  • Advising a senior hedge fund CEO under investigation for conduct related matters by the FCA.

Individual Representations

  • Representing senior executive in SFO and DOJ investigation into alleged bribery in the Ecuadorian state insurance market. The investigation was dropped against client pre-charge.
  • Representing individuals under potential criminal investigation by HMRC. The criminal tax investigation was dropped.
  • Representing senior executive during the investigation and criminal proceedings relating to phone hacking at the News of the World newspaper.

Article: Crypto meets criminal law: The UK’s new regulatory regime – Global Relay Intelligence & Practice – 11 September 2026

Article: What does the FRC’s overhauled investigation process mean for firms? – Business & Accountancy Daily – 10 August 2026

Article: FRC Audit Enforcement reforms: New pressure points for audited entities Insolvency Insider – 23 July 2026

Article: SFO Plan Focuses On Resilience But Funding Doubts PersistLaw360 – 6 May 2026

Article: What UK’s New Prosecution Guidance Means For ComplianceLaw360 – 18 September 2025

Article: Failure to prevent fraud: key takeaways for directorsBusiness & Accountancy Daily – 15 September 2025

Book: An International Guide to Corporate Internal Investigations, Second EditionAmerican Bar Association – 12 September 2025

Press Quote: What the ‘failure to prevent fraud’ offence means for advisersFT Adviser – 11 September 2025

Article: ANALYSIS: SFO-CPS issue corporate prosecution guidanceThomson Reuters Regulatory Intelligence – 2 September 2025

Press Quote: Signature Launches White Collar Crime and Investigations Practice with New Partner Team HireCorporate Counsel Business Journal – 14 July 2025

Press Quote: Mark Beardsworth and Duncan Grieve join Signature LitigationLitigation Finance Insider – 14 July 2025

Press Quote: Revolving Doors: Linklaters adds eight-lawyer Paris team as Goodwin hires in London and Broadfield recruits from Sidley and KirklandLegal Business – 11 July 2025

Press Quote: The Revolving Door: Goodwin Nabs Debt Pro From KirklandLaw360 – 11 July 2025

Press Quote: Dynamic Duo Putting a Signature on White Collar CrimeEdward Fennell’s Legal Diary – 11 July 2025

Press Quote: Signature makes twin London partner hire to launch white-collar crime practiceThe Global Legal Post – 11 July 2025

Interview: Signature Hires 2 Pros For New White-Collar Crime PracticeLaw360 – 10 July 2025

Press Quote: Signature launches new practice with white-collar duoCDR News – 10 July 2025

Press Quote: Goodwin and Cadwalader Partners Leave to Launch Signature’s White Collar PracticeLaw.com International – 10 July 2025