JUNIOR PROFILE
Debbie Grennan

Debbie Grennan

UK Bar 2026

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Chambers ranking badge

Ranked in 2 practice areas

Independent Investigations

All Circuits

3 years ranked

About

Provided by Guildhall Chambers

UK Bar

Practice Areas

Debbie Grennan is a highly sought-after and experienced Employment & Discrimination barrister.

Debbie Grennan is highly regarded for her expertise in high-value and complex discrimination and whistleblowing claims, as well as matters relating to equal pay and TUPE.

She regularly receives instructions on behalf of respondent local authorities and the NHS. In addition to her civil court practice, she appears before the Employment Appeal Tribunal (EAT).

Debbie has a balance of claimant and respondent work which covers all aspects of Employment & Discrimination law, as well as Business Protection & Trade Union law. She appears in the Court of Appeal, the Employment Appeal Tribunal, the High Court and County Courts, as well as the Employment Tribunal & Special Educational Needs (SEND) Tribunal.

Debbie is exceptionally highly regarded for her employment law expertise. However, a significant part of her practice is in conducting independent investigations. In this area, she is able to fully utilise her pragmatic and user-friendly approach, exceptional witness handling skills, forensic attention to detail, ability to critically analyse the evidence and prepare the highest quality, fully reasoned written reports.

Chambers Review

Provided by Chambers

UK Bar

Employment - Western (Bar)

Band 1
Band 1

Individual Editorial

Debbie Grennan is highly experienced in high-value and complex discrimination and whistle-blowing claims, regularly appearing in the ET and EAT. Debbie also handles matters relating to equal pay and TUPE. She regularly receives instructions on behalf of public sector clients, including respondent local authorities and the NHS.

Independent Investigations - All Circuits

Band 3
Band 3

Individual Editorial

Debbie Grennan is a leading employment barrister who is sought out for her experience in handing independent investigations, with a particular focus on healthcare and education.

Strengths

Provided by Chambers

  • She is one of those devastatingly calm advocates who is always prepared and keeps a calm manner when dealing with complex matters.

    EmploymentUK Bar
  • She is completely unflappable and a very calming influence on our frustrated and sometimes confused client.

    EmploymentUK Bar
  • Debbie is always excellent.

    Independent InvestigationsUK Bar
  • Debbie is an excellent advocate and has a very calming and reassuring style.

    Independent InvestigationsUK Bar

Ranked Barristers at Guildhall Chambers (87)

All Circuits

The Regions (Bar)

Western (Bar)

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