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Mark Cannon QC

Call: 1985 QC: 2008


Head of Chambers

Described in the directories as “superb”, “extremely solid and punchy” and “technically excellent”, Mark is a well-established commercial silk whose practice is mainly focused on the areas of professional liability in a commercial context, insurance and reinsurance and construction.  He is an experienced and highly effective advocate in trials, arbitrations and appellate courts and has appeared in numerous leading and reported cases.  Much of his work involves the preparation of cases for trial.  He also has a strong advisory practice and accepts appointments as an arbitrator.

His qualities are consistently recognised in the directories:

Ability: “immense intellect and awe-inspiring knowledge of the law” off-the-charts clever”  “not only charming and friendly, he has an almost encyclopaedic knowledge of complex areas of law which he applies in a way that is easy to understand” “what he doesn't know about professional negligence is not worth knowing" “second to none in terms of intellectual ability” “a velvet-gloved grasp of the law” “scarily clever” “brilliant at assessing the law” “very, very clever and is afforded great respect” “a very clear-thinking lawyer” “a very impressive intellect” “bright, erudite and incisive”

Acumen: “very good at recognising the commercial parameters within which his clients operate” “very good judgment in all that he undertakes” “a great ideas man” “gives very commercial advice backed up with a very strong commercial understanding of the law” “spot-on analysis” “has excellent judgement” “provides clear, reliable advice” “phenomenally clever, with practical and commercial sense as well”

Advocacy: “an excellent advocate” “very attractive advocacy style” “impressive in court and possessed of a very agile brain” “highly intelligent, good on paper and on his feet" “his manner of expression as an advocate is very impressive” “a real trooper who holds his corner in court well”

Application: "responsive, hands-on and hard-working” “prepared to roll up his sleeves and get into the facts and documents” “always reliable and responsive” “very user-friendly” “very hard-working and serious lawyer”

Mark likes to think that he lives up to these standards.

Over the last 30 years Mark has been instructed in a number of long-running, large cases, including group litigation.  He is used to working as part of a team of lawyers and experts in substantial litigation. He relishes the challenge of working with others to master complex facts and difficult points of law, to make the right tactical decisions, to put forward the best possible case and to achieve the best possible result at the right time.  Mark welcomes the expertise, insight and contribution that all members of a team can provide.

Mark is co-author of Cannon & McGurk on Professional Indemnity Insurance (OUP, 2010; second edition 2016) and has been an editor of Jackson & Powell on Professional Liability (Sweet & Maxwell, 7th edition) since the 3rd edition (1992).

He is a former chairman of the Professional Negligence Bar Association and is also a member of the Chancery Bar Association, COMBAR, London Common Law & Commercial Bar Association, Tecbar and the Western Circuit.  Mark is also a member of the Bar of Northern Ireland.


B.A. (Oxon) (First Class) in Modern History, Lincoln College, Oxford, 1983. Part 1B of the Law Tripos (First Class), Robinson College, Cambridge, 1984. Called to the Bar of Northern Ireland: 2014.