The Chambers & Partners Guide to the Legal Profession 2006/7 recommends Matrix as a leading set in environmental law, writing that:

“Brilliant at seeing the bigger strategic picture,” Daniel Brennan QC [top ranked] ... is representing 400 Bangladeshi claimants in Sutradhar v Natural Environment Research Council, the water-poisoning litigation concerning liability for professional advice. A revered writer and academic, Philippe Sands QC  [ranked second] includes environmental advisory work amongst his areas of expertise. Last year he represented the Government of Singapore in a mediation to resolve a waste shipment dispute with Indonesia. “A star at everything he touches,” David Wolfe  [top ranked] specialises in handling judicial review challenges. Able to draw on his scientific background to grasp the issues, he appeared in the Court of Appeal last year representing residents resisting the LNG terminals at Milford Haven. Building a formidable reputation in environmental regulation, Maurice Sheridan [ranked second] led four test cases on the interrelationship between the IPPC and Landfill Directives last year.... Kate Cook joins the rankings as the result of possessing a niche environmental practice with an international slant. Previously a lawyer at DEFRA’s international and EC division, she is well experienced and provides Greenpeace with ongoing advice on illegal logging practices.

Matrix ranked as joint 2nd Leading Set in Environment: 'Peers described Daniel Brennan QC as "a dream silk." "Leading the way in large claimant actions," he was extolled for his "intelligent way of constructing arguments" and "superior, but not sniffy, manner in Court." Philippe Sands QC "just exhibits supreme intellectual skills and has a spectacular grasp on the issues," said one impressed interviewee. His particular area of expertise is within the nuclear and minerals context. David Wolfe was accredited as being the "darling of the public law world" and gained plaudits for his "ability to distil the essence of a case in an uncomplicated way." "Great on his feet," he was said to be a junior "head and shoulders above the rest" in the field of judicial review challenges to regulatory decisions. Maurice Sheridan also won plaudits for an environmental practice that touches on regulatory matters and areas such as civil and criminal liability for environmental pollution. He was warmly praised for his "great courtroom presence" and for being "a pleasure to work with." Chambers & Partners - 2006)