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Milly Thomas LL.M.

she/herSenior Associate
About
Milly’s practice focuses on climate change and biodiversity, including international projects focused on climate change mitigation, adaptation and resilience. She advises on the negotiation and domestic implementation of international environmental law for the mitigation of climate change and protection of biodiversity, and advocacy strategies for law and policy which promotes access to justice for those most impacted by climate change. Amongst her clients are developing country governments, UN agencies, and non-profit organisations.

Passionate about using the law to advance climate action, Milly has completed a Master of Laws programme in environmental law and policy at University College London, where she was recognised for achieving the highest overall mark in her specialism and received an award for excellence in environmental law research. Since joining DLA Piper, Milly has undertaken several speaking engagements on issues of international environmental law and co-authored publications on issues including climate-related sea-level rise, the just transition and international climate diplomacy.
Bar admissionsSolicitor of the Senior Courts of England and Wales
Languages
  • English
  • French

AWARDS AND RECOGNITION

  • British Legal Awards, Rising Star (Private Practice) 2025 (Shortlisted)
Education
  • University College London, LLM Environmental Law and Policy, Distinction, 2022
  • University of Law, London, Legal Practice Course with MSc Law and Business Management, Distinction, 2016
  • University of Bristol, LLB Law and French, Hons, 2015

Publications and media

  • Thomas, Milly and Arthur, Riley, 'When sea-level rise forces relocation: pathways for resettlement for those displaced by sea-level rise' (14 Nov. 2025), in Anthony Crocket, Henrietta Hunter and Gudrun Johnsen (eds), Expert Essentials (Oxford, Oxford Law Pro).
  • Madariaga, Monserrat; Mara, Wendebourg; Thomas, Milly; Arthur, Riley and Crowley, Benjamin, 'Delegate's Guide to the Advisory Opinions: What implications for the UNFCCC negotiations' (9 Oct. 2025) Legal Response International.
  • Tattarletti, Olivia; Madariaga, Monserrat and Thomas, Milly, 'Just Transition Explainer' (16 Jun. 2025), Legal Response International.