- Phone
- 020 7405 7211
- Profile
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Profile
Position
Jon is the top-ranked UK King’s Counsel in The Legal 500’s European and Competition category and has for a number of years been the Chambers directory “Star Performer” (sole or jointly). He is also ranked as a leading counsel in the fields of Telecommunications and Administrative and Public law. He sits part-time as a deputy high court judge.
His range and skillset are formidable. He is at home in stringent cross-examination in a trial setting, in advancing legal arguments before appellate courts including the UK Supreme Court, and in appearing in the European Courts. He is qualified at the Bar of Ireland as well as the Bar of England and Wales, and is a member of the New York Bar.
Career
Qualified 1988, Middle Temple; member, New York Bar; contributor, ‘Common Market Law of Competition’ (3rd (supplement) and 4th edition); Standing Counsel to Office of Fair Trading 1997 – 2006; member of the Treasury ’A’ panel to 2006; Queen’s Counsel 2006.
Education
Haberdashers’ Aske’s School; Trinity College, Cambridge (1986 BA); Harvard Law School (1987 LLM).
Content supplied by Monckton Chambers
Testimonials
Collated independently by Legal 500 research team.
- 'David Hockney is particularly impressive, combining tradition with cutting edge commerciality. David is highly organised, commercially astute, and always willing to go the extra mile to ensure client satisfaction. He has a deep understanding of his barristers’ practices and the needs of instructing solicitors.'
- 'Always impressed by John Keegan - lovely to work with, incredibly commercial, hardworking, so personable.'
- 'Chris O'Brien is a very savvy and sophisticated member of the clerks room and a pleasure to work with.'
- 'Monckton Chambers is justifiably viewed as a premier set of chambers and a well-established leader in the field of Competition Law.'
- 'Monckton have led the way in all aspects of competition law. Genuinely impressive set.'
- 'Clerks are really responsive and generally great.'
- 'Monckton is a fantastic set, huge range of barristers, each with their own specialisms and areas of interests.'
- 'Monckton is the top set for competition. The strength-in-depth of counsel in the area is exceptional.'

