Tel: 020 7405 1222 or email

About Us

11 South Square is a leading set of barristers’ chambers specialising in all areas of intellectual property law.

The current Head of Chambers, Iain Purvis QC, leads a total of 5 Queen’s Counsel and 11 juniors, each specialising primarily in intellectual property law. Many of the barristers at 11 South Square have extensive previous experience in science and industry which puts Chambers in a position to offer legal advice and advocacy of the highest standard in this field.

Chambers is made up of a team of barristers that contains some of the most highly rated silks, strength at senior junior level with many leading on cases and junior members that are recognised as current and future stars. This reputation has meant that 11 South Square is consistently recognised in the legal directories for being ‘a set of choice for IP litigation’ and ‘the very best in terms of quality and service’ (Legal 500 2015) as well as ‘An obvious choice for solicitors seeking assistance on fiendishly complex cases due to the sheer number of highly rated barristers on offer’ (Chambers and Partners 2016).

Our members frequently act in leading cases in the areas of intellectual property, information technology and media and have appeared in courts and tribunals of all levels in the UK and other jurisdictions throughout the world, including the Court of Justice of the European Union. With increasing amounts of litigants seeking to resolve disputes through alternative means, members of Chambers have found themselves involved in many arbitrations and mediations, as advocates, mediators and members of expert panels both in Chambers’ core areas as well as other areas of law. A selection of both silks and juniors in chambers are accredited mediators.

We are proud to have provided four of the past fiveHigh Court Patents Judges. Mr. Justice Arnold and Mr Justice Carr followed the path of Mr. Justice Floyd and the late Lord Justice Pumfrey from Chambers to the High Court Bench. His Honour Judge Hacon was appointed as the first presiding Judge of the Intellectual Property Enterprise Court in December 2013.

In 2014 Brian Nicholson was appointed as Standing Counsel to the Comptroller General of Patents, Designs and Trade Marks, a role which will see him appear for the UK Government in intellectual property matters before the higher UK appeal courts and before the Court of Justice in Luxembourg.

Members of chambers are also actively involved with the Bar Pro Bono unit’s “Friends in Law” initiative. 11 South Square has continued to provide sponsorship for the scheme which helps provide assistance to applicants who have a meritorious case but cannot afford to pay for the assistance sought or cannot obtain public funding. Individual members of chambers have also contributed their own time to the scheme by advising applicants brought to them by the unit. Through involvement in this scheme, junior members of chambers have been able to further their advocacy experience.

11 South Square is also a signatory on the IP Inclusive Charter which has been established to promote equality, diversity and inclusion within the IP sector by an association of IP organisations.

All enquiries regarding instructing a barrister should, in the first instance, be directed to the clerks. The clerking team at 11 South Square is led by Ashley Carr. He, together with the other clerks, is always on hand to deal with any queries, provide information about members of Chambers and assist generally.

IP Inclusive Charter