Leigh Day

What Leigh Day does

Leigh Day is a UK-based claimant-side law firm founded in 1987 and headquartered in London, with approximately 800 staff across ten UK offices spanning London, Birmingham, Manchester, Bristol, Cardiff, Leeds, Liverpool, Newcastle, Plymouth, and Chesterfield. The firm delivers legal services across nine primary practice areas: group claims, environmental law, human rights, employment and discrimination, international/corporate accountability, medical negligence, personal injury, asbestos and industrial diseases, and consumer/competition/financial services. Its core proposition is representing individuals and communities against large corporations, government bodies, and multinationals, recovering over £1bn in compensation on behalf of clients over its 35+ year history. Active group actions range from gig-economy worker status claims (Uber, Just Eat, Bolt) to environmental pollution litigation (River Wye, PFAS) to public inquiries (Infected Blood, Covid-19, Undercover Policing).

The business model is professional services: revenue is generated from legal fees on a case-by-case basis, with a mix of private paying clients, legal aid funding, and conditional fee agreements (no win, no fee). Go-to-market is sales-led and claimant-driven, with client acquisition via direct enquiry through the website, phone, and email; referrals from existing clients, NGOs, and charities; and brand-led demand generated by press coverage in outlets such as The Guardian and Independent, plus podcasts, events, and a client-stories/review section. Distribution runs through the ten UK offices as direct-service points, with no disclosed channel partners, resellers, or technology product layer. The technology stack consists of standard case management, document management, and legal research tools, with no public API, software product, or proprietary platform. The firm is privately held by its partners, regulated by the Solicitors Regulation Authority (SRA no. 67679), and ranked Band 1 in 14 categories by Chambers and Partners and Top Tier by Legal 500.

Name

Leigh Day

Legal name

Leigh Day

Website

https://leighday.co.uk

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

251–500 employees

Short description

Leigh Day is a UK-based claimant-side law firm with around 800 staff across ten UK offices, representing individuals and groups against large corporations, government bodies, and multinationals. Its core practice spans group claims, human rights, environmental law, employment, medical negligence, personal injury, and public inquiries.

Ownership category

akta.pro rank

Product category

Legal Services

NAICS

Legal Services (5411), Offices of Lawyers (541110), All Other Legal Services (541199)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Claims Advocacy & Loss Recovery Services (FSAEADAH)

Keywords

• Claimant law firm
• Group litigation
• Human rights law
• Personal injury law
• Medical negligence claims

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices10 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Legal Services Fees: Revenue generated from legal services provided to individuals and groups, including compensation claims, judicial reviews, inquests, and human rights cases. The firm works on a mix of private paying clients, legal aid cases, and conditional fee agreements (no win, no fee arrangements).

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Leigh Day is a UK-based claimant-side law firm that provides legal representation and advice to individuals, groups, and communities against large corporations, government bodies, and other powerful entities. The firm delivers legal services across practice areas including group claims, human rights, environmental law, medical negligence, personal injury, asbestos/industrial disease, employment and discrimination, international cases, and consumer/competition claims, on a mix of private paying, legal aid, and no win no fee arrangements.

Product overview

Leigh Day is a law firm offering comprehensive legal services across multiple practice areas, operating as a unified legal services platform rather than a technology product. The firm provides Group Claims (collective litigation against corporations and government), Environment (climate and pollution litigation), Human Rights (abuse, discrimination, prison rights, inquests), Employment (equal pay, worker status), International (corporate accountability, environmental damage abroad), Medical Negligence, Personal Injury, Asbestos and Industrial Diseases, and Consumer/Competition claims. The services are delivered through specialized legal teams rather than software products.

Differentiator

Problem solved

Functional benefit

Products and services

• Group Claims Collective legal action representing groups of individuals against corporations and government bodies, including vehicle emissions claims, data breach claims, worker status claims, environmental pollution claims, and financial mis-selling cases.
• Environment Environmental law services covering access to environmental justice, climate change and air pollution litigation, international environmental damage cases, fossil fuel extraction claims, major infrastructure challenges, planning advice, and wildlife conservation.
• Human Rights Human rights legal services including abuse and exploitation claims, children's rights, police misconduct, data protection, discrimination, prison rights, inquests, judicial review, public inquiries, immigration, sexual harassment, and gambling harm claims.
• Employment and Discrimination Claims Employment law services focusing on equal pay claims, retail equal pay, settlement agreements, and worker status claims for gig economy drivers including Uber, Addison Lee, and Bolt.
• International International legal services covering corporate accountability, cases against the British Government, international corporate espionage, environmental damage abroad, gender and sexual violence, modern slavery, security and human rights, workers' health and industrial disease, and whistleblowing claims.
• Medical Negligence Medical negligence services including brain injury, illness and disease claims, cerebral palsy, perineal tear injuries, misdiagnosis, practitioner negligence, spinal injuries, surgical claims, medical inquests, armed forces medical negligence, and birth injury claims.
• Personal Injury and Cycling Claims Personal injury legal services covering cycling accidents, amputations, brain injuries, burn injuries, child injuries, clinical trials, fatal and serious accidents, faulty consumer products, travel accidents, food safety claims, spinal injuries, workplace accidents, road injuries, and foodborne illness outbreaks.
• Asbestos and Industrial Diseases Asbestos-related legal services including mesothelioma claims, asbestosis claims, workplace cancer claims, pleural thickening claims, silicosis and pneumoconiosis claims, industrial disease litigation, and overseas asbestos claims.
• Consumer, Competition and Financial Services Claims Consumer law and competition litigation services including competition law class actions, financial services mis-selling claims, shareholder claims, and consumer law disputes.

Quantifiable outcome

• Recovered over £1bn in compensation on behalf of clients over 35+ years
• +2 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Mishcon de ReyacoreOthersBoth Mishcon de Reya and Leigh Day are involved in separate PFAS-related legal proceedings in the UK, representing affected communities in chemical pollution cases.

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Bindmans LLP: London law firm with a near-identical claimant-side focus on human rights, civil liberties, inquests and judicial review. Closely comparable to Leigh Day's human rights department in client base, case types, and pro-access-to-justice mission.
• Hodge Jones & Allen: UK claimant-side firm specialising in personal injury, medical negligence, human rights and group actions. Very similar practice mix to Leigh Day and a direct competitor for the same pool of individual claimants against large defendants.
• Mishcon de Reya: Major London-headquartered law firm with strong claimant-side group litigation, human rights and corporate accountability work; already identified as a co-litigant with Leigh Day in UK PFAS proceedings, making it the closest like-for-like comparator by practice mix and client profile.
• Simpson Millar: UK claimant-side firm with significant personal injury, medical negligence and employment practices, including group litigation. Comparable mid-sized claimant model with overlapping practice mix to Leigh Day's PI/employment divisions.
• Slater and Gordon: UK claimant-side law firm with a strong personal injury, employment and group litigation practice. Directly comparable in conditional fee arrangements, advertising-driven lead generation, and mass-claim handling against large corporates.
• Thompsons Solicitors: UK firm founded to represent trade union members in personal injury and employment claims, making it one of the closest comparators to Leigh Day's employment and personal injury work on a claimant-only, social-justice orientation.
• Milners Solicitors: Northern England-based claimant-side firm active in personal injury, medical negligence and asbestos-related cases. Smaller scale than Leigh Day, but operates in the same CFA-driven claimant segment with overlapping niche practices (e.g., asbestos and industrial disease).

Broad incumbents

• Irwin Mitchell: Larger full-service UK law firm with a market-leading claimant personal injury and clinical negligence practice. Wider service portfolio than Leigh Day, but directly comparable on the personal injury and medical negligence work that makes up a major share of Leigh Day's revenue.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/LeighDay_Law
• LinkedInlinkedin.com/company/leigh-day

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Leigh Day