Mr Douglas Campbell KC > Three New Square Intellectual Property > London, England > Barrister Profile

Three New Square Intellectual Property
Three New Square


Barrister specialising in all aspects of intellectual property and information technology law. Silk 2016, Appointed Recorder in 2010, Deputy High Court Judge in 2015. Former member of Attorney-General’s Panel of Junior Counsel, 2010-2015. Called to Bar of Ireland in 2021. Has acted for many leading companies in the electronics, telecommunications, chemical, pharmaceutical, technology, consumer products and other industries. Recent UK cases include Interdigital v Lenovo [2023] EWCA Civ 34, [2023] EWHC 1577 (Pat), [2023] EWHC 172 (Pat) (patent for 4G/LTE mobile telecommunications); Dr Reddy’s v Warner-Lambert [2023] EWCA Civ 73, [2022] EWHC 189 (Pat), (damages enquiry on cross-undertaking, abuse of process); Neurim v Teva [2022] EWHC 1641 (Pat) (interim injunction, pharmaceutical patent); Fit Kitchen v Scratch Meals [2022] WLUK 350 (trade mark, equitable defences); Salt Ship v Prysmian [2021] EWHC 3583 (Comm) (designs, trade secrets, and publicity order); Planet Art LLc v Photobox [2020] ETMR 35 (trade mark, passing off, whether mark descriptive) Freshasia Foods v Lu [2019] EWHC 638 (Ch) (confidential information, restrictive covenants) Frank v Nike [2018] EWHC 1893 (Ch), [2018] EWCA Civ 497 (trade mark, interim injunction, social media); AP Racing v Alcon Components [2018] EWCA Civ 1420 (patent); Cantel Medical v Arc [2018] EWHC 345 (Pat) (patent, medical devices, designs); London Taxi v Frazer Nash [2018] FSR 7, CA (shape trade mark); Icescape v Ice World [2019] FSR 5, CA (leading CA case on patent infringement; entitlement to priority); Comic v Fox [2016] FSR 31, CA (validity of a series of trade marks); [2016] FSR 30, CA (leading UK case on trade mark infringement; “Glee” TV programme); Teva v Boehringer Ingelheim [2015] EWHC 2963 (patent, pharmaceuticals); Phil & Ted’s Most Excellent Buggy Co v TFK Trends for Kids [2014] EWCA Civ 469, [2013] EWPCC 21 (patent);  Vector v Glatt [2007] EWCA Civ 805, CA (added matter, patent); Coflexip v Stena Offshore [2004] FSR 34, CA (estoppel, damages); Stena v Irish Ferries [2003] RPC 668, CA (special defences to patent infringement); Helmet Integrated Systems Ltd v Tunnard [2007] FSR 34 16, CA (employee’s duties); Dyson v Qualtex [2006] RPC 31, CA (design right); Thermos v Aladdin [2002] FSR 11 (CA) (registered design).


Called 1993, Inner Temple; Deputy Editor, Terrell on Patents (Sweet & Maxwell).


Japanese, French.


IP Bar Association; Chancery Bar Association.


Dollar Academy, Dollar; Hertford College, Oxford (1988 First Class Hons with Distinction in Quantum Chemistry); City University, London (1992 Diploma in Law with Distinction); Inner Temple Major scholarship. Pegasus Scholar to Mallesons Stephen Jacques, Melbourne, Australia, in 1996.

Lawyer Rankings

London Bar > Intellectual property

(Leading Silks)Ranked: Tier 3

Douglas Campbell KC – Three New Square

The members of Three New Square are sought after for their skills in complex patent disputes, in addition to cases involving copyright, passing off, trade marks, and design rights. Guy Burkill KC focuses on patent litigation in the technology and telecoms sectors – he represented Apple and its distributors in a high-value telecoms-related patent dispute involving eight patents in four patent families against Optis, which claimed that Apple was using its technology without an appropriate license.  Douglas Campbell KC‘s practice encompasses both patent and non-patent work, and Thomas Hinchliffe KC has expertise in the pharmaceutical and electronics sectors.  Tim Austen regularly appears before the Patents Court, the Intellectual Property Enterprise Court, and the Court of Appeal he was also instructed by Match Group in successful trade mark infringement and passing off proceedings against Muzmatch, a Muslim dating app that claimed it had a defence of honest concurrent to be able to use the term ‘match’ in its branding. Charles Brabin is skilled in patent work regarding electronics, as is Joe Delaney.

London Bar > IT and telecoms (infrastructure and contracts)

(Leading Silks)Ranked: Tier 4

Douglas Campbell KCThree New Square ‘A hugely impressive all-rounder and great team player.’

The barristers at Three New Square are regularly instructed to act on behalf of technology and software developers and telecoms clients, smartphone sector clients in particular. With highly technical expertise, Guy Burkill KC continues to have a busy IP and IT practice, often instructed in high-value telecoms patent infringement actions. Most recently acting for Apple in the long-running piece of litigation in relation to Optis’ patent portfolio and Apple’s failure to pay any royalties in respect of it. Thomas Hinchliffe KC acted as leading counsel for Optis in the fourth of the technical trials. Joe Delaney successfully represented Nokia in the first of a number of technical trials involving Nokia’s standard essential patents pertaining to 3G, 4G and 5G technology in Nokia v OnePlus & others. Douglas Campbell KC acted in a case relating to computer software and financial trading strategy in which breach of confidence, copyright and contract was alleged.