Continuity in UK Labour Law: John Hayes Rejoins Global Law Experts

Membership Renewal Announcement

Global Law Experts is pleased to announce the renewal of John Hayes of Constantine Law as our Exclusive Member for Labour Law in the United Kingdom for the next 12 months. We are delighted to continue this collaboration and to reaffirm our confidence in the contribution that John and Constantine Law make to the network. This renewed term reflects a shared commitment to providing carefully considered, pragmatic and commercially focused labour law advice to clients operating in the United Kingdom and across jurisdictions.

Why John Hayes is a strong fit for the network

John Hayes brings a depth of experience in UK employment law that aligns closely with the needs of corporate in-house teams, law firms and senior executives who consult the Global Law Experts network. As founder and Managing Partner of Constantine Law – the UK’s leading employment law boutique –  John has developed a practice that is focused on high stakes employment and regulatory disputes, strategic advisory work and complex team move and restrictive covenant matters. 

Several features of John Hayes practice make him a particularly good fit for Global Law Experts members and clients. First, John has substantial litigation experience up to the High Court and in specialist employment forums. Second, his work routinely covers cross border and sector specific issues that arise for multinational clients, including technology, financial services and regulated sectors. Third, Constantine Law operates as a focused employment boutique that emphasises pragmatic outcomes, which complements the networks aim of connecting clients with experts who can deliver both technical accuracy and commercially sensible solutions.

Practice strengths and areas of expertise

• Restrictive covenants and team moves – John has a well established practice in injunctions and enforcement proceedings concerning restrictive covenants and confidential information. This includes high value and time sensitive disputes where urgent relief is required and strategic court applications are central to preserving client positions.
• High Court and tribunal litigation – The practice regularly handles complex litigation, including injunctions and claims in the Employment Tribunal, Employment Appeal Tribunal and the civil courts. That litigation capability supports clients who need representation at every level of the UK court system.
• Unfair dismissal and whistleblowing – John advises on sensitive claims involving unfair dismissal, whistleblowing protection and related remedies. That advisory work often includes strategic reputational assessment and coordinated response planning for employers and executives.
• Discrimination and equal treatment matters – The practice provides guidance and representation in discrimination, equal pay and related workplace equality disputes, combining legal analysis with practical steps to reduce organisational risk and exposure.
• Transactional and advisory work – Beyond litigation, John advises clients on transactional issues that affect the workforce, including TUPE transfers, senior executive onboarding and exit arrangements, and the drafting of employment contracts and senior executive documentation.
• Cross border counsel – John and Constantine Law advise US owned and other international businesses on the interplay between UK employment rules and international operations. This cross border perspective is valuable to multinational clients navigating employment compliance and operational change.

Relevant professional profile highlights

John established Constantine Law to provide a specialist, agile employment law service with a focus on strategic litigation and advisory work. The firm and John have been recognised in market directories and peer guides for employment law expertise. John is an active commentator on developments in UK employment law and engages with the legal community through writing, events and a firm hosted employment law podcast. This combination of high level advocacy, practical advisory work and public engagement supports the role of an Exclusive Member within a global referral network.

How this renewal benefits Global Law Experts members

Renewing John Hayes membership for Labour Law in the United Kingdom strengthens the network in several concrete ways. Members seeking insight or referral on contentious and non contentious UK employment matters will have direct access to a practitioner who regularly handles strategic High Court and tribunal work. The renewal also provides continuity for clients who value a single point of contact in the UK with experience advising both corporate employers and senior executives.

For in jurisdiction referrals the renewal means that Global Law Experts can confidently offer a UK labour law contact who understands the commercial pressures facing employers and senior hires. For cross border matters members will benefit from Johns experience advising international and US owned businesses on UK employment law risks and on the practical steps needed during organisational change.

Network priorities and shared values

Global Law Experts places a priority on quality, reliability and jurisdictional expertise when selecting exclusive members. John Hayes and Constantine Law demonstrate those attributes through a focused employment law practice, a track record of complex litigation and an emphasis on delivering clear, commercially minded advice. The renewal underscores the networks commitment to partner with practitioners who combine technical excellence with responsiveness to client needs.

What clients and colleagues can expect in the coming year

During the renewed membership term members and clients can expect continued availability for high level employment law matters, timely commentary on legislative and judicial developments affecting the UK workplace and collaboration on cross border referrals. Constantine Laws approach is to provide direct, outcome orientated advice, and that practical focus will guide the work undertaken through the network. Where disputes are urgent the firms experience in obtaining interim relief and managing litigation timetables will remain an asset to network referrals.

Closing remarks

Global Law Experts is thrilled to have John Hayes onboard for an additional 12 month term as our Exclusive Member for Labour Law in the United Kingdom. The renewal reflects our confidence in Johns sector specific experience, litigation capability and the practical advisory approach of Constantine Law. We look forward to continuing to work with John and his team to support clients seeking authoritative and commercially realistic employment law guidance in the United Kingdom and on matters that cross international borders.