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Overview
Introduction
With a career spanning private practice and the European Court of Justice, Donald focuses on EU competition, subsidy and regulatory law.
Donald Slater has focused on EU law since 2000, mainly working in private practice but also in the EU institutions and academia. He has extensive experience in EU and UK subsidy law, advising governments, beneficiaries and complainants in relation to the EU State aid and UK subsidies regime as well as, more recently, preparation for the entry into force of the EU Foreign Subsidies Regulation. He has diverse and in-depth experience in litigation before European courts, having represented clients in various cases ranging from state aid and regulatory issues to cartel cases and abuse of dominance. Donald returned to Ashurst in 2018 after spending three years in the European Court of Justice in the chambers of an Advocate General, working on cases in all fields of EU law, with particular emphasis on regulatory law.
"Donald Slater is a standout litigator, representing the likes of UEFA in high-stakes cases before the ECJ and General Court." Legal 500 2023" Donald Slater is uncomplicated and easy to work with. He is pragmatic, approachable and not too legalese. He has really good business acumen."
Chambers 2024
Latest thinking
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Quickguides
EU State aid
May 15, 2026
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Legal development
Moving the goalposts: Tondela – no-poach agreements and sporting rules
May 11, 2026
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Quickguides
Competition law investigations by the European Commission
This Quickguide summarises the procedure followed by the European Commission.
May 06, 2026
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Quickguides
Overview of EU competition law
May 05, 2026
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Quickguides
EU merger control
This Quickguide provides an overview of the EU merger control regime.
May 05, 2026
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Quickguides
Dawn raids: dealing with inspections by European competition authorities
May 05, 2026
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Legal development
A new chapter for industrial Europe: the Industrial Accelerator Act
April 21, 2026
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Legal development
New rules on vertical arrangements in the EU and UK
March 26, 2026
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Legal development
ECJ strikes down State aid for Paks II nuclear for procurement failures
September 22, 2025
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Legal development
Simplified State aid rules to spur the Clean Industrial Deal
July 04, 2025
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Legal development
New avenue to challenge State aid decisions on environmental grounds
May 19, 2025
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Legal development
CJEU sharpens stance on active sales bans in exclusive distribution
May 15, 2025
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Latest news, deals and awards
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