James Segan QC

Blackstone Chambers (London)

James is recognised as a leading barrister in a total of nine practice areas by Chambers and Partners UK, Chambers Global, Legal 500 and Who’s Who Legal. He was appointed Queen’s Counsel in March 2020 at the age of just 38. He is regularly instructed in some of the largest litigation in the UK, including several of The Lawyer’s Top 20 cases of recent years (such as SFO v ENRC; Canary Wharf v European Medicines Agency; Unwired Planet & Conversant v Huawei; Breyer v DECC and Tchenguiz v SFO). He won an award from Global Investigations Review for his advocacy in SFO v ENRC. James practises in regulatory, commercial and public law, with sector expertise in telecoms, sport, media and entertainment, procurement and intellectual property. Prior to taking silk, he was on the Attorney General’s "A" Panel and was featured in Legal Week’s “Stars at the Bar” and The Lawyer’s “Rising Stars”.


889 Bulletin

James Segan QC The England and Wales Court of Appeal reinforces that market definition is a tool in competition analysis and substance must prevail over form (Talktalk Telecom / Office of Communications & Anor)


TalkTalk v Ofcom – the Court of Appeal stresses that market definition is a tool not an end* The Court of Appeal, in TalkTalk v Ofcom [2013] EWCA Civ 1318, recently gave an important reminder to all competition practitioners that market definitions are a tool rather than an end: what matters is (...)

James Segan QC The UK Appeal Tribunal of the Rugby Football Union rules that provisions for Primacy of Tenure with three clubs exemption rule constitute an infringement of Articles 101(1) and 102 TFEU (London Welsh / RFU)


Competition law achieves fair play* The London Welsh decision provides a rare but telling example of competition law marching its way onto the field of professional sport. London Welsh won rugby union’s Championship in the 2011-12 season. This would, in ordinary circumstances, have entitled (...)

Send a message