"He's extremely experienced, authoritative and has a calm manner. He brings wisdom to a case."

Chambers & Partners, 2022

"He is one of the top public law solicitors around and has a very tactical feel for matters."

Chambers & Partners, 2022

“Adam Chapman has public law experience that is second to none, after a long career with the Government Legal Department followed by a move into the private sector. He is trusted by clients and has excellent judgement.”

Legal 500 UK 2022

"He knows everything, has seen everything and has extraordinary depth of experience"

Chambers UK 2021

"Adam Chapman in particular is intellectually talented, but also highly pragmatic. He represents his clients’ interests vigorously, but fairly, and it is always a pleasure to work with, and more strikingly against, him”

Chambers UK 2021

Adam joined Kingsley Napley in January 2010 as a partner in the Public Law team. He has nearly 30 years experience as a public lawyer and previously spent most of his career in central government, working at the Treasury Solicitor’s Department and at the Attorney General’s Office.

Recognised as a “leader in his field” in Chambers and Partners UK and Legal 500, Adam’s areas of expertise include:

In his judicial review practice he acts for both claimants and defendants with cases arising out of criminal investigations – including challenges to search warrants and arrests - regulatory proceedings and all aspects of policy development and implementation. His experience includes taking cases in the European Court of Human Rights and the European Court of Justice.

Adam has very significant experience in acting for parties involved in public inquiries. Recent significant cases include acting for participants in the Independent Inquiry into Child Sexual Abuse, the Renewable Heat Incentives Inquiry and the Paterson Inquiry. He has equally deep experience in inquest work, recently acting for the sisters of PC Keith Palmer in the Westminster Bridge Inquest.

His data protection work ranges from compliance advice through to advising on responses to information security breaches and appeals against decisions of the ICO. Under the freedom of information regimes he acts both for organisations and individuals seeking to obtain information and public bodies when responding to requests.

What clients and directories have said

Stand-out partner Adam Chapman.... They are market leaders, but maintain a courteous manner in dealing with opponents, all the while protecting their client’s interests to the best of their ability. They are genuinely interested in and impressive contributors to public law."

Legal 500 UK, 2021

Adam Chapman has much experience in advising on public inquiries. His informed insights into the probable thinking of those involved in the inquiry is very helpful in shaping the strategic approach. Adam shows a good grasp of the overall objectives of the client and tailors his advice accordingly. His client care, demonstrated by periodic brief e-mails providing interesting information, developments or background, are appreciated."

Legal 500 UK, 2021

Adam Chapman in particular, is intellectually talented, but also highly pragmatic. He represents his clients' interests vigorously, but fairly, and it is always a pleasure to work with, and more strikingly, against him."

Legal 500 UK 2021

Superstar in public law.”

Chambers UK, A Clients Guide to the UK Legal Profession,  2020

Go-to person for defendant institutions and regulators.”

Chambers UK, A Clients Guide to the UK Legal Profession,  2020

Adam Chapman is an excellent public and regulatory lawyer. Very solutions focused and practical."

Legal 500 UK, 2020

Provides clear and firm advice and demonstrates a keen insight on the likely decisions and responses a public inquiry is likely to make."

Legal 500 UK, 2019

 Really bright" as well as "thorough, quick and knowledgeable."

Chambers UK, A Clients Guide to the UK Legal Profession,  2018

A very wise, astute public law lawyer," according to sources, who add: "He was a Treasury solicitor for a long time, which gives him a very well-rounded judgement."

Chambers UK, A Clients Guide to the UK Legal Profession,  2017

...one of his great skills is that he can see the detail of an issue and bigger picture at the same time - he sees the wood and the trees."

Chambers UK, A Clients Guide to the UK Legal Profession,  2017

Sound judgement and a well-rounded view, having had previous experience at the Treasury Solicitor," according to interviewees. Sources note that "he is extremely accommodating and very assiduous in the work he does," and "immensely knowledgeable in his field and knows how to litigate against the government.”

Chambers UK, A Clients Guide to the UK Legal Profession,  2016

...‘quite simply exceptional’...

Legal 500 UK 2012



  • Criminal Law - Practice and Procedure
  • Butterworths Commercial Judicial Review and Regulatory Proceedings Conference - 'The Human Rights Act and commercial judicial review'


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Case Note – costs of interested parties in judicial review proceedings: CPRE Kent v Secretary of State for Communities and Local Government UK/SC 2019/0174

Data Subject Access Requests: The Do’s and Don’ts for Charitable Organisations

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Commercially sensitive information and the nincompoop’s law

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