LAWYER PROFILE
John Hayes

John Hayes

Global 2026

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Constantine Law
 Constantine Law

Ranked in 1 practice area

Employment

UK

2 years ranked

Contributions and articles

4 Articles, Press releases, highlights

About

Provided by Constantine Law

Practice Areas

John Hayes is one of London's leading solicitors in restrictive covenant disputes and an experienced High Court practitioner. He has obtained numerous injunctions for a range of corporate clients, in the High Court, in recent years, including in employment agency, wealth management and retail sectors. During 2025 he represented a national employment agency business in the Court of Appeal on an employment status case.

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Professional Memberships

Member of:

American Bar Association,

Employment Lawyers Association,

Institute of Directors,

rish International Business Network

Publications

John regularly writes articles for trade, legal and national press.

Education

University of Oxford

BA (Hons)

1989 - 1992

Awards

Practising Solicitor

Law Society

2001

Key sectors

Aviation and AerospaceBusiness and Professional ServicesAgriculture and Agribusiness

Chambers Review

Provided by Chambers

Chambers Global Guide

Employment - UK

Band 5
Individual Editorial

John Hayes is the founder and partner at Constantine Law. He has experience handling various employment matters including on behalf of senior executives.

Learn more about this teamView ranking table

Strengths

Provided by Chambers

  • He is a wonderful person to have in your corner and I think genuinely cares about securing outcomes for his clients.

    EmploymentChambers Global Guide

  • John was fantastic.

    EmploymentChambers Global Guide

  • John Hayes has been outstanding throughout. His leadership, clarity and attention to both detail and big-picture strategy are consistently impressive.

    EmploymentChambers Global Guide

  • John Hayes is very commercial, handles clients very well and gives them confidence. He always goes out to bat for the client and is very good with them.

    EmploymentChambers Global Guide

Ranked Individuals at Constantine Law (1)

UK

Articles, Highlights and Press Releases

4 items provided by Constantine Law

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