Leigh Hancher

Baker Botts (Brussels)
Lawyer (Partner)

Leigh Hancher is Partner at Allen & Overy (Amsterdam). She specialises in European and Dutch law relating to network sectors including gas, electricity, telecoms, transport, post and water and is internationally recognised as a leading expert and commentator in this field. Her expertise is primarily in the field of interconnection between competition law and sector-specific regulation with a particular emphasis on access pricing and conditions, State aid and cross-subsidisation. Her work has included representing private sector clients in litigation before national regulatory bodies and the European courts, in international arbitration proceedings, in competition notifications to the European Commission and national regulatory authorities, and advising on State aid complaints to the European Commission. In addition, she has regularly assisted major clients in preparing and managing lobby strategies and documents on relevant competition and regulatory issues at national and European level. She has advised clients on the regulatory and competition law aspects of cross-border interconnectors and has notified a number of applications for regulatory and/or competition clearance for such projects at European and most recently national level. She has regularly acted as an adviser to the European Commission and the European Parliament on energy law issues. Leigh is a professor of European law at the University of Tilburg and was a member of the Scientific Council for Government Policy (WRR). Prior to 1997, she was a professor of European law at the Erasmus University Rotterdam. She was visiting professor of Natural Resources Law at the University of Calgary, Canada. Furthermore, she was Head of Legal Services at the Energy Charter Secretariat until 1999. Leigh has lectured on European and national electricity law issues throughout Europe, North America and Japan at both academic and commercial conferences and has published widely on electricity law in many leading journals. She contributes regularly to Financial Times specialist newsletters on legal and policy issues, particularly in the European energy sector.

Linked authors

Ecole Nationale Superieure des Mines de Paris
Thieffry & Associés (Paris)
European University Institute (Florence)
EDF (Paris)
Deloitte (Paris)
Florence School of Regulation (FSR)
European University Institute (Florence)


601 Bulletin

David Gabathuler, Leigh Hancher, Santos Miguel Leyva Rubio, Daniel Vasbeck The EU Court of Justice reinforces its strict approach and holds that alterations to an approved aid scheme are to be cleared by the Commission (Dilly’s Wellnesshotel)


The EU’s State aid procedures are complex and often slow and not always easy to navigate. Many companies may be content to leave the process of obtaining a green light from the European Commission (the “Commission”) to government authorities. Or they may take comfort from the fact that a large (...)

Matthew Levitt, David Gabathuler, Daniel Vasbeck, Leigh Hancher, Brian R. Byrne, Ella Adler The EU General Court delivers two judgements clarifying how State aid rules apply to national tax rulings and determines whether a transfer pricing ruling in respect of intra-group transactions confers a selective advantage under the EU State aid rules (Fiat / Starbucks)


On 24 September 2019, the General Court (the ‘Court’) upheld the European Commission’s (the ‘Commission’) ruling ordering Luxembourg to recover EUR 23.1 million from Fiat Chrysler Finance Europe (‘FFT’) and annulled the Commission’s ruling ordering the Netherlands to recover EUR 25.7 million from (...)

369 Review

Adrien de Hauteclocque, Dorte Fouquet, François Lévêque, Jean-Michel Glachant, Leigh Hancher, Marcelo Saguan, Patrick Thieffry, Sébastien Douguet, Vincent Rious Nouvelles interactions et tensions entre la politique énergétique européenne et l’approche de la Commission en matière d’aides d’État


The growing number of challenges on energy policy that the European Union faces call for a review and an update of the current mechanisms implemented for market integration and energetic transition. A new paradigm regarding the utilisation of State aid by EU member States to serve national and (...)

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