Hailsham Chambers

William Flenley KC practises in the fields of professional liability, insurance, regulatory and contract law.  He has appeared in a number of leading cases relating to the liability of professionals, including a trio of recent reported cases in the Court of Appeal: Addlesee v Dentons Europe [2020] Ch 243 (privilege), Group Seven v Notable Services [2020] Ch 129 (dishonest assistance in breach of trust), and Various Claimants v Giambrone & Law [2018] PNLR 2 (application of Saamco).  He is co-author of the best known practitioners’ book on claims against solicitors, Flenley & Leech, The Law of Solicitors’ Liabilities.   The first edition was published in 1999 and the fourth edition in August 2020.

William is a former Chairman of the Professional Negligence Bar Association. He has contributed to Cordery on Legal Services and Professional Negligence and Liability, was deputy editor of Lloyd’s Reports: Professional Negligence, and has lectured in law at the London School of Economics. He is a Bencher of the Middle Temple. He has been recommended as a leading barrister practising in professional liability by each of the two principal directories for many years and has been shortlisted in the Chambers Bar Awards 2020 as Professional Negligence Silk of the Year. 

William is also a board member of Thames Reach, a homelessness charity. 

Called 1988, Middle Temple; KC 2010. Publications: Ough and Flenley ‘The Mareva Injunction and Anton Piller Order’ (3rd ed 1993); Flenley and Leech, ‘Solicitors’ Negligence and Liability’ (3rd edition, 2012); contributor ‘Professional Negligence and Liability’; former contributor to ‘Professional Negligence and Liability’ and ‘Cordery on Legal Services’.

French.

Professional Negligence Bar Association (chairman).

Oxford (BA); Cornell University, New York (LLM); BCL.