Lydia Allaby-Tiller is an English-qualified associate in the London office of Gibson Dunn. She is a member of the firm’s Litigation and International Arbitration Groups.
Her practice focuses on high-profile, multijurisdictional litigation in the High Court, Court of Appeal and Supreme Court, with particular expertise in arbitral award challenges involving sovereign states, civil fraud, complex data infringement matters in the technology sector, and banking disputes.
She is recognised as a key lawyer for Premium Commercial Litigation in The Legal 500 UK 2025 and 2026 rankings, described as “incisive and a brilliant litigation mind” with “great drive, determination, and ability to marshal a team to great effect” and “an absolute star partner of the future”.
Lydia has represented sovereign states, high net worth individuals, and clients across a range of industries including technology, professional services, financial services, transport, and real estate. She also advises on crisis management and public law matters.
She maintains a strong interest in strategic human rights litigation, having worked with NGOs such as REDRESS, ILGA-Europe, and the European Council for Refugees and Exiles. Her experience includes bringing cases before the European Court of Human Rights and the African Commission on Human and Peoples’ Rights.
Prior to joining Gibson Dunn, Lydia was a managing associate at another law firm.
Representative experience*:
- Advised Josef Stava and Diag Human SE in their defence of a $750 million investment treaty award challenge brought by the Czech Republic.
- Advised the Government of Nigeria in its landmark case successfully setting aside an $11 billion arbitral award in favour of a BVI company arising from a failed gas deal, on the basis that the award was procured by fraud and contrary to public policy.
- Advised a leading high street financial institution in High Court proceedings relating to historic FX trading.
- Advised a multi-billion-dollar tech company on complex data infringement issues.
- Advised an international ridesharing company in a licensing appeal resulting from Transport for London’s refusal to renew its Private Hire Vehicle licence.
- Advised a private wealth management firm in financial crime proceedings brought by the Bahamian Director of Public Prosecutions in the Supreme Court of The Bahamas.
- Advised a leading challenger retail bank in regulatory investigations brought by the Prudential Regulation Authority and Financial Conduct Authority relating to its risk weighted assets and disclosure obligations under the Listing Rules.
- Advised a multinational financial institution facing prosecution in the German courts for historical cum/ex trading.
- Advised a multi-billion-dollar international software company in a High Court dilapidations dispute.
*Some of these representations occurred prior to Lydia’s association with Gibson Dunn.
Capabilities
Credentials
Education:
- University of Law - 2017 Legal Practice Course
- University of Law - 2016 Graduate Diploma in Law
- University of Exeter - 2013 Bachelor of Arts
Admissions:
- England & Wales – Solicitor