Thomas' practice focuses on the energy sector, including in particular renewable energy projects (onshore and offshore wind, biomass/biosteam), security of supply (capacity mechanisms, strategic reserves), grid tariffs, subsidy mechanisms (such as green certificates and, including State aid issues), domain concessions and licences, district heating, contracts (including corporate PPAs and FIDIC agreements), litigation and judicial review (Council of State, Markets Court, Brussels Court of Appeal, Constitutional Court).
Thomas also has considerable experience in the field of competition law, with over thirty merger filings with the European Commission, the Belgian and the Dutch competition authorities.
He is the author of several articles and publications about energy and competition law. 
Thomas speaks annually at the 'Energy Law Capita Selecta' conference and contributes to the Energy Law Annual.

Sectors & Markets
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Memberships

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Brussels Bar, 1997
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Qualifications

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Postgraduate Diploma in Economics for Competition Law, King’s College London (United Kingdom), 2009
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LL.M. in European Law, Universiteit Gent (Belgium), 1997
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Law degree, Universiteit Antwerpen (Belgium), 1996

What others say

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Thomas Chellingsworth is recognised as Recommended in Energy - Power/Electricity
Who's Who Legal - (2023)
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Thomas Chellingsworth is the most knowledgeable Belgian lawyer on energy law matters in its broadest form. He advises project developers on the development of their projects in all its aspects. He is very knowledgeable as well in all relevant regulatory matters but also in all relevant contract and construction law matters. ‘
Legal 500 - EMEA (2023)
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Thomas Chellingsworth named "Leading individual" in Industry Focus: Energy
Legal 500 - EMEA (2023)
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Thomas Chellingsworth is recognised as Recommended in Energy - Oil & Gas
Who's Who Legal - (2023)
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Thomas Chellingsworth is recognised as Recommended in Energy - Renewables
Who's Who Legal - (2023)
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One client enthuses that Thomas Chellingsworth is an "excellent lawyer who provides deep and thoughtful analysis," while another appreciates that he "explains things very clearly."
Chambers & Partners - Europe (2022)
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Thomas Chellingsworth and Marc Vermylen are among the most experienced energy regulatory lawyers in Belgium. The standards are very high. They work in a very solution-oriented fashion, also in case of litigation.’
Legal 500 - EMEA (2022)
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‘Thomas Chellingsworth is exceptional in his field. He knows all the ins and outs, without losing oversight of the bigger picture. He advises clearly to non-specialists and manages to give concrete and practical input that you can actually use when structuring up your financing transaction.’
Legal 500 - EMEA (2022)
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Clients laud him for being "a very driven lawyer with a lot of useful knowledge, who is straight to the point, analytical, friendly and strategically strong."
Chambers & Partners - Europe (2021)
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Thomas Chellingsworth is a true expert.
Legal 500 - EMEA (2021)
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Thomas Chellingsworth is a very communicative and hands-on partner with vast experience in, and knowledge about, the energy sector and a business-oriented approach in his advice
Legal 500 - EMEA (2021)
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Professional, correct, thorough research, a lot of knowledge and the ability to apply this knowledge to specific cases. Thomas Chellingsworth and Christine Delagaye are open to consultation, easy to reach and strategically strong.
Legal 500 - EMEA (2021)
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Thomas Chellingsworth

Partner - Attorney at Law

thomas.chellingsworth@loyensloeff.com

Brussels

English, Dutch, French

Person image

<p>Thomas Chellingsworth is a local partner of the Energy and Infrastructure practice group in our office in Belgium. He is recognised as a leading energy law expert, with extensive experience of electricity and gas projects and litigation. </p>

Thomas' practice focuses on the energy sector, including in particular renewable energy projects (onshore and offshore wind, biomass/biosteam), security of supply (capacity mechanisms, strategic reserves), grid tariffs, subsidy mechanisms (such as green certificates and, including State aid issues), domain concessions and licences, district heating, contracts (including corporate PPAs and FIDIC agreements), litigation and judicial review (Council of State, Markets Court, Brussels Court of Appeal, Constitutional Court).
Thomas also has considerable experience in the field of competition law, with over thirty merger filings with the European Commission, the Belgian and the Dutch competition authorities.
He is the author of several articles and publications about energy and competition law. 
Thomas speaks annually at the 'Energy Law Capita Selecta' conference and contributes to the Energy Law Annual.