Martyn Day

Ranked in 5 Practice Areas

Senior Statespeople

Environment: Claimant

UK-wide

17 Years Ranked

Senior Statespeople

Personal Injury: Mainly Claimant

London (Firms)

28 Years Ranked

Senior Statespeople

Group Litigation: Claimant

UK-wide

2 Years Ranked

Senior Statespeople

International Human Rights Law

UK-wide

3 Years Ranked

Senior Statespeople

Civil Liberties & Human Rights

UK-wide

6 Years Ranked

Ranked in Guides

Global 2025

About

Provided by Martyn Day

Practice Areas

Martyn Day is the Senior Partner at Leigh Day. He has a leading reputation for international, product liability and environmental claims, often as group actions. He heads a team of lawyers who represent claimants in the UK and overseas in cases against corporate or governmental bodies.

Career

From Colombotti & Partners, moved to Clifford and Co., then went to Bindman & Partners. In 1987, set up Leigh Day with Sarah Leigh OBE.

Professional Memberships

Board member of Greenpeace Environmental Trust, Leadership Council Member of Earthrights International, Former Chair of the Chem Trust, Former Chair of Greenpeace UK

Publications

Martyn regularly addresses lectures, seminars and media on environmental and justice issues.

Chambers Review

Provided by Chambers

UK

Civil Liberties & Human Rights - UK-wide

Senior Statespeople

Individual Editorial

A renowned claimant lawyer, Martyn Day brings an unmatched level of expertise to his broad domestic and international practice. He frequently represents marginalised workers who have suffered human rights abuses abroad.

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International Human Rights Law - UK-wide

Senior Statespeople

Individual Editorial

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Group Litigation: Claimant - UK-wide

Senior Statespeople

Individual Editorial

Co-founder of the firm Martyn Day is renowned for acting on landmark group litigation cases often with human rights, product liability or environmental elements. He represents thousands of claimants against large companies including British American Tobacco and VW.

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Personal Injury: Mainly Claimant - London (Firms)

Senior Statespeople

Individual Editorial

Martyn Day is celebrated for his pioneering personal injury claims against corporations and government bodies, arising out of injuries sustained both at home and overseas. His areas of expertise include misconduct by the military, environmental pollution and historic rights violations.

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Environment: Claimant - UK-wide

Senior Statespeople

Individual Editorial

Martyn Day is widely acclaimed for his expert handling of multiparty actions against major corporations. He has a wealth of experience representing foreign nationals in environmental cases.

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Strengths

Provided by Chambers

He has been instrumental in bringing many cases in the English courts.

Civil Liberties & Human Rights respondent
UK

Martyn is one of the absolute superstars of the English legal system and civil liberties litigations. He manages cases in a way that no one else does.

Civil Liberties & Human Rights respondent
UK

Martyn is the best of the best. He is a master strategist and negotiator.

Civil Liberties & Human Rights respondent
UK

Martyn has unrivalled experience running big litigation on behalf of claimants. He has astute legal vision and he is good at identifying the pressure points of a case.

Group Litigation: Claimant respondent
UK

Martyn is the best of the best: a master strategist and negotiator.

Group Litigation: Claimant respondent
UK

He is very good to deal with, very pragmatic and sensible.

Group Litigation: Claimant respondent
UK

Martyn is a strategist par excellence.

Personal Injury: Mainly Claimant respondent
UK

Martyn is the best of the best. He is a master strategist and negotiator.

Environment: Claimant respondent
UK

Martyn is at the absolute top in terms of knowledge and experience of claimant group actions. He is very tactically astute.

Environment: Claimant respondent
UK

He has been instrumental in bringing many cases in the English courts.

Civil Liberties & Human Rights respondent
UK

Martyn is one of the absolute superstars of the English legal system and civil liberties litigations. He manages cases in a way that no one else does.

Civil Liberties & Human Rights respondent
UK

Martyn is the best of the best. He is a master strategist and negotiator.

Civil Liberties & Human Rights respondent
UK

Martyn has unrivalled experience running big litigation on behalf of claimants. He has astute legal vision and he is good at identifying the pressure points of a case.

Group Litigation: Claimant respondent
UK

Martyn is the best of the best: a master strategist and negotiator.

Group Litigation: Claimant respondent
UK

He is very good to deal with, very pragmatic and sensible.

Group Litigation: Claimant respondent
UK

Martyn is a strategist par excellence.

Personal Injury: Mainly Claimant respondent
UK

Martyn is the best of the best. He is a master strategist and negotiator.

Environment: Claimant respondent
UK

Martyn is at the absolute top in terms of knowledge and experience of claimant group actions. He is very tactically astute.

Environment: Claimant respondent
UK

Articles, highlights and press releases

3 items provided by Leigh Day

Article

Shipbreaking judgment is timely reminder of shipping companies' liabilities

In July 2020, a High Court judgment in Begum v Maran [2020] EWHC 1846 (QB) was handed down where, for the first time, an English court has grappled with the controversial issue of “shipbreaking”.

Jun 16, 2021

Authored by Martyn Day, Daniel Leader, Richard Meeran, Alex Wessely

Article

Settlement agreed with Petra Diamonds Limited following claims of serious human rights abuses

A settlement has been agreed with Petra Diamonds Limited following claims of serious human rights abuses at its majority-owned Williamson diamond mine in Tanzania

Jun 14, 2021

Authored by Daniel Leader, Martyn Day, Richard Meeran, Sapna Malik, Matthew Renshaw

Article

Shipbreaking judgment: The shipping industry and the law of negligence

Oliver Holland and Rachel Bonner discuss the judgment of the Court of Appeal in Hamida Begum (on behalf of MD Khalil Mollah) v Maran (UK) Limited.

Jun 14, 2021

Authored by Martyn Day, Daniel Leader, Richard Meeran, Sapna Malik, Oliver Holland

Article

Shipbreaking judgment is timely reminder of shipping companies' liabilities

In July 2020, a High Court judgment in Begum v Maran [2020] EWHC 1846 (QB) was handed down where, for the first time, an English court has grappled with the controversial issue of “shipbreaking”.

Jun 16, 2021

Authored by Martyn Day, Daniel Leader, Richard Meeran, Alex Wessely

Article

Settlement agreed with Petra Diamonds Limited following claims of serious human rights abuses

A settlement has been agreed with Petra Diamonds Limited following claims of serious human rights abuses at its majority-owned Williamson diamond mine in Tanzania

Jun 14, 2021

Authored by Daniel Leader, Martyn Day, Richard Meeran, Sapna Malik, Matthew Renshaw

Article

Shipbreaking judgment: The shipping industry and the law of negligence

Oliver Holland and Rachel Bonner discuss the judgment of the Court of Appeal in Hamida Begum (on behalf of MD Khalil Mollah) v Maran (UK) Limited.

Jun 14, 2021

Authored by Martyn Day, Daniel Leader, Richard Meeran, Sapna Malik, Oliver Holland

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