Marcus Barclay

Partner, CMS Cameron McKenna Nabarro Olswang LLP


Marcus is a real estate litigator focusing on strategic advice and commercial outcomes recognised as a leader in real estate litigation by Chambers and in the Legal 500 “Hall of Fame”. 

He is one of a small number of solicitors specialising in Business Rates advising on high value complex appeals working with the top rating surveyors and counsel.    

He is also one of the leading rent review specialists in the country working frequently with the large surveying practices on substantial rent reviews. Marcus is a member of Arbrix and has been a guest speaker both there and at Index. Marcus has also delivered a Blundell memorial lecture.

Marcus is a member of the Property Litigation Association and an accredited CEDR Mediator.

Marcus has advised on numerous high value disputes concerning business rates, dilapidations, break clauses, professional negligence, landlord and tenant and development agreements as well as many large central London rent review arbitrations.

Awards & Recognitions

Quote: “Marcus Barclay has unrivalled expertise in valuation disputes. He is thorough, thoughtful and very easy to work with.’ Legal 500 2025”


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