Duncan is a Managing Associate in our "absolutely stellar" Competition, Antitrust and Trade team in London. Duncan specialises in competition and regulatory law and has extensive experience of their application within a wide range of industries. He has advised on both UK and EU competition investigations and sector enquiries/market investigations, as well as Phase 1 and Phase 2 merger investigations. Duncan has also helped lead on the defence of some of the UK's most significant class action competition damages cases. Clients report (in Legal 500) that “Duncan Green has enormous knowledge, great temperament, and is a total team player. A pleasure to work with.” (2026), that he is "an outstanding associate, who is very knowledgeable" (2024) and “an exceptional associate [who] should be recognised as an upcoming leader” (2025).
Duncan's experience includes:
- EC / UK / Global merger control (including FDI): CEZ / Rolls-Royce SMR (EC Phase 1); ION / Broadway (Phase 1 with remedies); Suez / Veolia (Phase 2); Doehler / Treatt Plc (various Phase 1 clearances); Future / TI Media (Phase 1 with remedies); Scape Living / GCP; APG / Scape JV (EC Phase 1); Aon / Griffiths & Armour.
- Investigations / behavioural: AC Milan / European Super League; FCA asset managers / Artemis (no case to answer); EC video games; CMA hydrocortisone; Equinox II / Ofcom CA 98 complaint; CMA excessive pricing (case closed pre-SO)
- Market studies / investigations: FCA wholesale market data; PSR card acquiring; CMA statutory audit; ORR ticket gates and vending machines; CMA investment consultancy and fiduciary management; CMA online platforms and digital advertising.
- Litigation: Justin Le Patorel v BT (successfully defending BT in the first UK class action to go to trial); Nikki Stopford v a large technology company (class action defending a large technology company); OBCRL v a large technology company (class action defending a large technology company); Hydrocortisone NHS follow-on damages.
