Antonia Brewer

Specialisms

Antonia Brewer is a senior associate and experienced employment law solicitor at Thomas Mansfield Solicitors. She provides clear and commercial employment law advice and strategy for employers, senior executives and professionals across a wide range of industries.

Her work spans both advisory and contentious matters, including drafting and reviewing employment contracts and service agreements, managing complex workplace disputes, advising on all aspects of discrimination, TUPE, redundancy, disciplinary and grievance processes, whistleblowing and negotiating exits. She is also regularly instructed as a settlement agreement solicitor, acting for both employer and executive clients, in particular C-suite and senior level executives.

Antonia has significant experience in Employment Tribunal litigation, managing cases from early risk assessment through to final hearing or negotiated resolution. She works closely with HR teams, in-house counsel and business owners to reduce risk and resolve disputes efficiently and with minimal disruption.

Her advice is always focused, practical and aligned with her clients’ objectives – whether she’s advising on day-to-day HR issues or high-value executive exits.

Experience & approach

Antonia brings a calm, strategic approach to her work, helping clients navigate complex legal issues with confidence. She combines legal precision with commercial awareness, ensuring her advice is grounded in both law and the operational realities of the workplace. She is instinctive, collaborative and focused on delivering clear outcomes.

Antonia qualified as a solicitor in October 2004 and has since built extensive experience in employment law. She began her career at a large regional practice, advising both employee and employer clients on a broad range of contentious and non-contentious employment matters.

Antonia is recognised as a Recommended Lawyer in The Legal 500 for her employment law expertise.

Notable work

• Advised a senior board member on discrimination and whistleblowing claims, and negotiated a favourable outcome.
• Advised employer client on union dispute and illegality of proposed union action, which led to a resolution of the underlying dispute and prevented a further escalation and bad publicity for the employer.
• Defended a senior executive in High Court injunction for breach of restrictive covenants.
• Advised a senior Board level executive on claims in respect of unpaid notice, commission and bonus, with proceedings to be issued at both High Court and Employment Tribunal.