“He understands the law – not just the dry legal stuff, but the context around it”
Chambers & Partners 2015
Duncan Sinclair is expert in commercial disputes, public law and EU / competition law (including public procurement disputes). He “comes highly recommended by market sources, and is praised for his commercial bent”, Chambers UK 2012, he “offers quick, clear and concise advice” Chambers UK 2013 and is “a safe pair of hands, able to get on top of complex facts quickly”, Legal 500 2014 whilst being “good at thinking on his feet” Chambers UK 2016. His practice involves advisory work, dispute resolution (notably in disputes with and investigations by regulatory bodies) and litigation (largely in the High Court and the Competition Appeal Tribunal).
A Partner at the energy regulator and competition authority Ofgem (2005-2010) before returning to the Bar in 2010 “He has excellent knowledge of energy regulation, and is down to earth and easy to work with” Legal 500 2015. He was the lead director on the largest abuse of dominance case (National Grid) ever successfully prosecuted in the UK. In the year of his return to the bar, Duncan was listed in The Lawyer’s “Hot 100” lawyers across the UK legal profession.
Recently instructed by the Competition and Markets Authority in its high profile Energy Market Investigation as external counsel (2014-2016), Duncan has also represented a UK competition authority in National Grid v ABB (and ors) in the High Court damages claim (one of The Lawyer’s top 25 cases of 2015).
Duncan has acted in many of the leading judicial reviews in regulated sectors in recent years, representing Friends of the Earth in the successful Solar Panels judicial review in the High Court and the Court of Appeal, Drax Energy in its judicial review in relation to an Investment Contract, Solar Century in a judicial review of DECC’s renewables policy, RWE Generation in a challenge to changes to Ofgem’s charging regime, Oxford Airport in its challenge to use of military airport facilities for commercial purposes, and successfully defending the Legal Services Board in the High Court and Court of Appeal in the QASA case. He has acted for an Interested Party in the online travel agents sector in Skyscanner v the CMA before the Competition Appeal Tribunal (the first successful challenge to a commitments decision in the UK) and continues to regularly act in complex commercial disputes (for instance involving power purchase agreements and other contracts).
Duncan’s work is equally split between litigation and advisory/other dispute settlement matters. He regularly represents parties in respect of regulatory investigations and in disputes as to the application of regulatory regimes. He advises local authorities and others on the application of the public procurement rules, including the regeneration of Central Coventry City Cenre, and (increasingly) acts for parties to procurement litigation.
Duncan sits on the Editorial Board of Butterworths’ Competition Law Service, to which he also contributes as an author, and regularly contributes to the leading practitioner journals and seminars on competition and commercial judicial review.
Sample of recent matters:
Sample of recent cases:
R. (on the application of RWE Generation UK Plc) v Gas and Electricity Markets Authority  1 C.M.L.R. 17
Solar Century Holdings Ltd v Secretary of State for Energy and Climate Change  EWCA Civ 117;  B.L.R. 341
Skycanner v Competition and Markets Authority  3 All E.R. 67;  Bus. L.R. 1318;  Comp. A.R. 41
Skycanner v Competition and Markets Authority  CAT 7
Counted4 Community Interest Co v Sunderland City Council  EWHC 3898 (TCC) (acting for winning contractor in procurement exercise)
R. (on the application of Oxford Aviation Services (t/a London Oxford Airport)) v Secretary of State for Defence  EWHC 3898 (TCC); 164 Con. L.R. 230
R. (on the application of Drax Power Ltd) v Secretary of State for Energy and Climate Change  EWHC 2377 (Admin);  EWCA Civ 1153
Lumsdon & Ors, R (On the Application Of) v Legal Services Board (Protective Costs Orders)  EWHC 3289 (Admin)
Lumsdon & Ors, R (On the Application Of) v Legal Services Board (Divisional Court)  EWHC 28 (Admin)
R. (on the application of Homesun Holdings Ltd) v Secretary of State for Energy and Climate Change  EWHC 3575 (Admin);  A.C.D. 28
Affirmed in Court of Appeal  EWCA Civ 28;  Env. L.R. 25;  A.C.D. 29; (2012) 109(6) L.S.G. 20; (2012) 156(4) S.J.L.B. 31
National Grid Electricity Transmission Plc v ABB Ltd  EWHC 822 (Ch);  U.K.C.L.R. 177 (Submissions under the Competition Law Practice Direction)
National Grid Plc v Gas and Electricity Markets Authority  EWCA Civ 114;  U.K.C.L.R. 386