11 South Square > London, England > Set Profile

Chambers of Iain Purvis KC
11 South Square

London Bar > Intellectual property Tier 1

11 South Square is well-known for its work on leading IP cases in first instance trials and appeals, and its members are well-versed in appearing before the European Patent Office, General Court, and Court of Justice of the European Union. Iain Purvis KC has an all-encompassing IP practice, from patents to trade marks, and Michael Silverleaf KC is notable in cases involving complex technical facts, including monoclonal antibodies, medical devices, drug delivery systems, automotive catalysts, and wind power generation. Of recent note, he acted for the claimant in Original Beauty Technology Company & Others v G4K Fashion & Oh Polly, which concerned claims of passing off and infringement of design rights. With his scientific background, Mark Vanhegan KC is regularly instructed by high-profile clients across all levels of courts and tribunals, and he successfully represented Philips in a trial concerning the validity of two of its patents. The set is also home to patent expert Piers Acland KC, and Hugo Cuddigan KC, who has substantial experience in the music and entertainment industries.

Rising stars

Ranked: Tier 1
Mitchell Beebe – 11 South SquareMitchell is extremely responsive, personable, and intelligent.'
Ranked: Tier 1
Ranked: Tier 1

Leading Silks

Ranked: Tier 1
Ranked: Tier 1
Mark Vanhegan KC11 South Square ‘Mark is a class act. He is calm and thorough in court and he is often the difference between winning and losing a case.'
Ranked: Tier 1
Ranked: Tier 2
Benet Brandreth KC11 South SquareBenet is an exceptional, classic advocate who is known for his comfortable and flawless presentation even in difficult technical cases. He is also a formidable cross-examiner and his opponents have been known to completely abandon their factual and expert evidence mid-trial following his careful deconstruction of their case.’
Ranked: Tier 3
Ranked: Tier 3
Brian Nicholson KC11 South Square 'Brian is one of the top silks at the IP bar. He is superb on his feet and a delight to work with.'
Ranked: Tier 3

Leading Juniors

Kathryn Pickard11 South Square 'Kathryn is always calm and unflappable, and has a deceivingly razor-sharp mind. She thinks on her feet very quickly and her advocacy is brilliant - she has a calm yet forceful nature to her advocacy, and she has a lot of credibility with the bench.'
Ranked: Tier 1
Ranked: Tier 1
Chris Aikens11 South SquareChris is a clear thinker and is able to articulate strategy well to solicitors and clients. His advocacy is cool and well-paced, and he is able to win against more senior, grandiose, and flamboyant opponents.'
Ranked: Tier 2
Ranked: Tier 2
Christopher Hall11 South Square ‘Christopher is one of the leading juniors at the IP Bar; he is a great all-rounder and an excellent advocate who can hold his own against more senior barristers.’
Ranked: Tier 3
Tom Alkin11 South SquareTom has first-rate judgment and an ability not to lose sight of the big picture.'
Ranked: Tier 3
Ranked: Tier 3
Jacqueline Reid11 South Square ‘Jacqueline gives clear and direct advice to both solicitors and clients alike. She is very robust and will fight the client’s corner, and she is well-prepared and always knows the case well.’
Ranked: Tier 4
Adam Gamsa – 11 South Square ‘A thorough junior who is easy to work with.
Ranked: Tier 4


‘The clerks at 11 South Square are very helpful and engaged with matters to ensure smooth running. Ashley Carr is fantastic and always on hand if listing or availability issues arise and is very keen to smooth things over if unexpected availability issues do happen from time to time.’

‘Jordan Foley and Sam Fullilove are the best IP clerks.’

‘A strong set and among the strongest for IP.’

‘They are leaders in the field.’

‘The barristers at 11 South Square have a broad range and depth of experience and they instil confidence that they can resource any IP issue.’

‘The clerking at 11 South Square is second to none. They are extremely responsive and flexible when the need arises.’

‘The clerks do a brilliant job.’

‘The clerks are responsive and friendly.’

London Bar > Media and entertainment Tier 2

11 South Square houses a number of highly regarded barristers who act in media and entertainment cases concerning copyright infringement, brand protection and use of goodwill cases, frequently for clients in the music industry. Hugo Cuddigan KC is instructed by digital radio aggregator TuneIn concerning the hyperlinks to international radio stations it provides to its users in Warner Music & Sony Music v TuneIn Inc.

Leading Silks

Michael Silverleaf KC11 South Square ‘Excellent at getting into the details, listening to the ideas of the team, putting the right arguments forward forcefully, being available when needed, embedding as part of the wider team.’
Ranked: Tier 2
Ranked: Tier 2
Mark Vanhegan KC11 South Square ‘Highly client-friendly, and gives clear and robust advice. Both written and oral advocacy is very good indeed and pitched perfectly to the tribunal he is addressing.’
Ranked: Tier 2

Leading Juniors

Tom Alkin11 South Square ‘A pleasure work with and a great team player. Consummate advocate. Clear, calm, incisive, and immensely persuasive.’
Ranked: Tier 3


‘Ashley Carr, Sam Fullilove and Jordan Foley are all experienced and user friendly.’

‘Ashley Carr is great to work with, responsive and accommodating to client’s needs, while being realistic about timescales.’

’11 South Square’s clerks are excellent, responsive, clear and will always go the extra mile.’

‘Excellent clerks.’

‘Very strong set with strength in depth. There is always someone appropriate to take on a given case.’




Work highlights

London Bar > IT and telecoms (infrastructure and contracts) Tier 3

Members at 11 South Square have extensive experience in high-level technology disputes and are frequently instructed to act in disputes at the intersection of IP and IT law. With a combination of decades of experience in the field and technical backgrounds, members are particularly well-placed to handle complex disputes acting for high-profile technology clients. Mark Vanhegan KC appeared for LzLabs in IBM UK Limited v LzLabs, a dispute relating to alleged breaches of agreements pertaining to mainframe computer systems and raising issues about software copyright and reverse engineering.

Leading Silks

Ranked: Tier 1
Mark Vanhegan KC11 South Square ‘Very on the ball. Cooperative. Able to ask the key questions in cross-examination.’
Ranked: Tier 1
Ranked: Tier 3




‘One of the top IP chambers. Always on my list of ones to look to for high quality advocates.’ 

Work highlights

Dispute resolution > Mediators Tier 5

Michael Silverleaf KC – 11 South Square  11 South Square‘s Michael Silverleaf KC is 'personable and technically excellent, but also direct in his manner. This allows him to cut through the noise and connect with clients. Michael is not afraid to challenge a party's position where appropriate, which is especially useful in a difficult dispute where parties are entrenched'. A member of the Nominet Dispute Resolution Service Expert Panel since 2008, Silverleaf QC is a go-to mediator for IP-related disputes.

11 South Square is a leading set, specialising in intellectual property law, additionally well-known for its media and information technology work. With many recent cases setting precedents in all areas of IP law, 11 South Square has continued to be highly regarded in the field. Members are often singled out for the excellent quality of advice and advocacy provided.

The set: 11 South Square was founded in 1923 by Sir Stafford Cripps. Chambers currently has 16 members, five of whom are King’s Counsel, headed by Iain Purvis KC. In 2015 Henry Carr was appointed as a High Court Judge sitting in the Patents Court. He joins the long list of former members recently called to the Bench including current Patents Court Judge Mr Justice Arnold, presiding Judge of the Intellectual Property Enterprise Court Richard Hacon, current Court of Appeal Judge Lord Justice Floyd, as well as the late Lord Justice Pumfrey.

Types of work undertaken: Members of 11 South Square regularly appear before the Supreme Court, the Court of Appeal and the High Court as well as the Intellectual Property Enterprise Court and the UK Intellectual Property Office. In addition, barristers from 11 South Square have appeared before the European Patent Office in Munich and also the General Court and the Court of Justice of the European Union.

Representation and advice in patent matters is an important part of chambers’ work. The command and conduct of such cases requires a thorough understanding of the science and technology involved. Due to their technical expertise, many members act in complex computer software and IT disputes.

11 South Square has been involved in many of the recent important cases in the areas of performers’ rights, copyright, trade marks, confidential information and also the developing law of privacy, personality and celebrity endorsement. The creation of an unregistered design right and database right has greatly expanded the work in this area, with members frequently appearing in leading cases.

Some members have particular expertise in disputes which involve the Data Protection Act and have appeared extensively in cases before the Information Tribunal.

Recent cases include: Wobben Properties GmbH v Siemens Public Ltd Company & Ors, Teva (UK) Ltd v Gilead Sciences Inc, Property Renaissance Ltd (t/a Titanic Spa) v Stanley Dock Hotel Ltd (t/a Titanic Hotel), Victoria Plum Ltd (t/a Victoria Plumb) v Victorian Plumbing Ltd, Generics (UK) Ltd (t/a Mylan) v Warner-Lambert Co LLC, Nicocigs Limited v Fontem Holdings Limited, Meter-Tech Llc & Anor v British Gas Trading Ltd, Koninklijke Philips NV v Asustek Computer Incorporation & Ors, Cartier International AG & Ors v British Sky Broadcasting Ltd & Ors, Napp Pharmaceutical Holdings Ltd v Dr Reddy’s Laboratories (UK) Ltd and Sandoz Ltd, Sony v SSH, Idenix Pharmaceuticals Inc v Gilead, Abraxis Bioscience LLC v Comptroller General of Patents, Ap Racing v Alcon Components, IPCom v HTC & Brightpoint, Edwards Life Sciences v Boston Scientific, Nicocigs v Fontem Holdings, British Gas v Meter Tech, Nap Pharmaceuticals v Dr Reddy’s & Sandoz, Varian v Elekta.

Department Name Email Telephone
Members of Chambers PURVIS KC, Iain (1986)
Members of Chambers SILVERLEAF KC, Michael (1980)
Members of Chambers VANHEGAN KC, Mark (1990)
Members of Chambers ACLAND KC, Dr Piers (1993)
Members of Chambers CUDDIGAN KC, Hugo (1995)
Members of Chambers LAWRENCE, Dr Heather (1990)
Members of Chambers REID, Jacqueline (1992)
Members of Chambers BRANDRETH, Benet (1999)
Members of Chambers NICHOLSON, Dr Brian (2000)
Members of Chambers EDWARDS-STUART, Dr Anna (2002)
Members of Chambers PICKARD, Kathryn (2001)
Members of Chambers ALKIN, Tom (2006)
Members of Chambers AIKENS, Chris (2005)
Members of Chambers HALL, Christopher (2010)
Members of Chambers IVISON, Dr David (2014)
Members of Chambers GAMSA, Dr Adam (2015)
Members of Chambers VAVER, Prof David*
Members of Chambers BENTLY, Prof Lionel (2009)**
Members of Chambers * Associate member
Members of Chambers ** Door tenant
Photo Name Position Profile
Piers Acland photo Dr Piers Acland Experience in all types of contentious intellectual property work. He has a…
Chris Aikens photo Chris Aikens Chris’ practice covers all areas of intellectual property law as well as…
Tom Alkin photo Tom Alkin Barrister specialising in intellectual property and related fields. Recent cases include: Philip…
Lionel Bently photo Prof Lionel Bently Professor Lionel Bently has gained invaluable experience and knowledge in all areas…
Benet Brandreth photo Benet Brandreth Barrister practising in all areas of intellectual property law, as well as…
Hugo Cuddigan photo Hugo Cuddigan Specialist in intellectual property (patents, trade marks, copyright). Recent significant cases include:…
Anna Edwards-Stuart photo Dr Anna Edwards-Stuart Barrister specialising in intellectual property. Recent reported cases include: Original Beauty Technology…
Christopher Hall photo Christopher Hall Barrister established in all intellectual property disciplines, and in commercial disputes with…
Heather Lawrence photo Dr Heather Lawrence Barrister specialising in intellectual property matters including: patents, trade mark, registered designs,…
Brian Nicholson photo Dr Brian Nicholson Senior barrister specialising in all areas of intellectual property and related fields…
Kathryn Pickard photo Kathryn Pickard Barrister specialising in intellectual property law. Recent cases include: AutoStore Technology AS…
Iain Purvis photo Iain Purvis Barrister specialising in intellectual property. Recent notable cases include: Abbott Laboratories Limited…
Jacqueline Reid photo Jacqueline Reid Barrister dealing with intellectual property, including: trade marks, design right, copyright, passing…
Michael Silverleaf photo Michael Silverleaf Barrister in many leading intellectual property cases involving: patents, trade marks, passing…
Mark Vanhegan photo Mark Vanhegan Barrister dealing with all aspects of intellectual property law, media and entertainment…