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John Warchus


Area of Expertise

  • Commercial
  • Corporate and Commercial
  • Intellectual property
  • IT/Telecoms


  • Technology
  • Retail
  • Education/Universities
  • Charities/Not for profit

I am a Partner in the Corporate and Commercial group specialising in commercial and technology law.  For 25 years, I have advised clients  on a wide range of complex commercial contracts and IT and IP issues.  My initial experience as a litigator advising on large scale IT disputes has been very useful in avoiding the pitfalls that can befall technology contracts.  For the bulk of my time, I am helping clients to negotiate and draft complex commercial/technology agreements and related areas such as data protection, social media and procurement issues.  I am also closely involved with the protection and exploitation of intellectual property and clients include UK universities and retailers.

My clients range from tech start-ups  to multinationals and public sector organisations. We always strive to be an extension of the client’s commercial or legal team and, indeed, for many clients, we act as their legal department.  Accordingly, we need to be responsive and focus on key issues only and avoid point scoring against other lawyers.

I am increasingly called upon to act for foreign clients doing business in the UK or for advice under a contract governed by English law.  Equally, I am able to assist UK clients who need foreign legal advice through good connections with foreign law firms, In particular, I am a member of the IT and IP Law Group Europe which is a specialist network of European lawyers specialising on IT and IP matters.

I am recognised as a legal expert in both the Legal 500 and Chambers Directories.

I have acquired particular experience in advising clients in the following sectors:

  • Technology

  • Healthcare / Pharmaceuticals

  • Education / Universities

  • Retail

  • Charity / Not for profit


  • Society For Computers and Law

  • The IT and IP Law Group Europe


I have advised the following clients through my career:

Carillion,, EDS, ICL Fujitsu, Canon, G4S, Mouchel, Paperchase, University of Reading, University of South Wales, Mahindra Satyam, Atmel Corporation, and Intellectual Property Online.

Directory quotes

Provides extremely clear and upfront advice with an ability to get a result in difficult transactions Chambers and Partners

Extensive experience of acting for major international technology suppliers Chambers and Partners


"John was extremely easy to deal with. He has very good commercial skills and good client management skills; he’s very affable. In terms of what he was saying to the companies, his knowledge of the subject area showed him to be quite clearly very knowledgeable, experienced and very well connected. I can’t fault him at all." Client

"John is on the forefront of technology developments. He’s very interested in IT law and data privacy and is a strong asset. He understands the business environment around technical
 products and IP, as well." 

"He's clear and articulate. He's also very practical, and takes us through the issues and explains the risks. John seeks to understand the commercial implications of the contract. He uses common sense with a thorough and detailed approach, and we're very luck to have him." Client

"He's very accessible and responds quickly. John's advice is practical, to the point and can be used immediately. He has vast experience and seeks a business-orientated solution for problems." Client

"John is very experienced, with a real ability to break down a problem into component parts and deal with them very effectively. John is someone I can trust and can get a good response from in the timeframe I want."  Client

“The overall quality of service we have received has been excellent.  We have found John Warchus and his team to be extremely responsive, knowledgeable of our business and very helpful when negotiating commercials and points of law with suppliers.” Martin Proudlove, IT Director, Mouchel

"I am the EMEA Counsel of a public US semiconductor company. We have worked with John and his team for quite some time and have been impressed with all aspects of his work. John's analytical ability and years of experience enable him to provide thoughtful, thorough, and, most importantly, practical legal advice regarding a wide variety of technology, commercial and contract law issues. He listens carefully to client questions and comments and he responds quickly and clearly with analysis and advice aimed directly at the issue. He has an amazing ability to reduce complex issues and technology into simple concepts that business people can understand." Johan Huizing, Senior Director Legal, Atmel Corporation

“We work very closely with John and his legal team who are a very effective extension of our commercial team: he knows our business well and has proved to be invaluable at negotiating and drafting our key agreements by only focusing on relevant commercial issues that matter to us. We would always seek out his views on an important legal issue.” Rita O'Kyere, Intellectual Property Online Limited

"John stepped in at short notice and handled a case, which was quite impressive given the circumstances. He is very much to the point, without any hot air - he is sound and, in my opinion, always well balanced." Independent third party

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