Colin became the senior partner of Simmons & Simmons in 2011, but continues to maintain his litigation practice. Over the last 32 years Colin has worked in England, Hong Kong and the Middle East from where he has developed a varied commercial litigation practice that encompasses both international and domestic disputes. His particular focus areas are finance litigation, extradition disputes and large professional indemnity claims.
Colin published the 3rd edition of "Privilege" in July 2013. This is one of the leading textbooks on the subject of legal professional privilege. Colin also authors Passmore on Privilege: a blog, which reviews the more interesting cases arising under the law of legal professional privilege.
He joined Simmons & Simmons in 1986, becoming a partner in 1990 and a solicitor advocate (civil) in 1999. He is chairman of the Membership Committee of the Academy of Experts.
Colin Passmore is cited in Chambers UK 2016 as an “Eminent Practitioner” for both Banking Litigation and Dispute Resolution: Elite. He is also the only “Eminent Practitioner” recognised for Professional Negligence. He is “well regarded by peers” and considered a figure of great authority as “a recognised expert in issues of privilege”. He was listed in The Top 100 for the London Super Lawyers Magazine 2013.
Client feedback in Chambers UK 2016 states: “a class act and great to deal with.” Colin is also recognised for his strong client service skills and commercial approach to their needs stating “He’s an excellent tactician with great technical ability and really good at giving commercial advice”. He is also recognised for his “deep experience” in professional liability disputes, particularly those matters arising within the legal and financial services sectors.