Marianne’s areas of practice are Employment, Tax, Commercial Litigation, Professional Negligence and Insurance & Reinsurance work.
She is adept at advocacy and frequently appears in the Employment Tribunal, First-tier Tribunal, county courts, EAT and High Court. She has been commended for her clear advice and compelling advocacy, and obtaining “excellent results” for her lay clients.
Before coming to the Bar, Marianne worked for an MP in the House of Commons and for Hanover Communications, a PR firm with expertise in public affairs consultancy.
Marianne practises all areas of Employment and Discrimination Law. She has considerable experience representing clients in the Employment Tribunal, including high-value multiple-day hearings, in which she is frequently against more senior counsel. She also has significant experience of representing clients in the EAT in unfair dismissal and discrimination appeals, in which she has appeared unled against a leading silk.
She represents both Claimants and Respondents and works for a variety of public and private sector organisations, including multinational and FTSE 100 companies, banks, insurance companies, airlines, retailers, hotels, charities, local authorities, schools and police forces.
As well as advocacy and advisory work, she provides seminars on employment law and mock tribunals for clients. Marianne is forging a particular specialism in complex whistleblowing cases and has written extensively about the topic. She is presently on the ELA Working Party addressing the European Commission's consultation on EU whistleblowing protection.
Recent work includes:
Marianne also has a keen interest in employment status and the gig economy, having written her LLM dissertation on the topic, and has experience of the area in the tax context (see below). She is a regular contributor to the Practical Law Employment Blog and Industrial Law Journal, as well as being an Executive Committee member of the Industrial Law Society.
Marianne accepts instructions from both HMRC and taxpayers in a contentious and advisory capacity. She has been involved in the work of members of chambers, including litigation in the First-tier Tribunal, Upper Tribunal and Court of Appeal.
She is currently instructed by HMRC as a junior to Adam Tolley QC (Fountain Court Chambers) and Christopher Stone (Devereux) in a number of IR35 cases involving the media industry and public sector. She is able to draw upon her experience of employment status cases in the ET context (see above). In particular, she has acted in:
She has also advised taxpayers with respect to High Court claims arising out of statutory appeals brought by an end-user regarding the application of s.689 ITEPA.
Marianne has experience of high value residence cases. She is presently instructed by HMRC as a junior to Akash Nawbatt QC and Christopher Stone in a statutory appeal concerning a high net worth individual, which also raises discovery issues (Hargreaves v HMRC).
As a pupil, Marianne gained experience relating to the:
Marianne is regularly instructed in an advisory capacity and as an advocate in commercial disputes. Much of her commercial practice involves professional negligence and insurance work (see below). Her more general commercial matters include business, property, consumer and other contractual disputes in the county courts and High Court. This includes:
She has been also led on a variety of commercial cases and assisted members of chambers with international arbitrations and mediations. She also has experience of commercial injunctions. Notably, she assisted Shaen Catherwood in obtaining a without notice injunction (from Birss J) and a costs order on the indemnity basis (from Mann J) in the Chancery Division against an ex-director of a large company in Friendly Pensions Ltd v Austin.
Marianne provides seminars and mock arbitrations for clients on a range of commercial matters. Drawing upon her expertise in discrimination law, she is a member of the COMBAR Equality & Diversity Committee.
Marianne has worked on a range of professional negligence disputes and has particular experience of claims against solicitors, barristers, accountants, conveyancers and valuers. She provides pleadings, advices, letters of claim and response, and advises on policy coverage issues.
Marianne is an adept litigator and is regularly instructed to appear in application hearings and CCMCs in the county courts. She has experience of striking out and obtaining summary judgment in respect of a multi-million pound claim brought against a firm of solicitors. She was recently instructed as a junior to Richard Harrison in a high value accountant’s negligence claim which raised complex points about accessory liability and unlawful means conspiracy.
As a pupil, Marianne assisted:
Marianne accepts instructions in insurance and reinsurance work. She has experience of both advisory and contentious work. She has been instructed to review commercial combined business insurance policies for multinational and FTSE 100 companies and brokers' agreements.
As a pupil to Richard Harrison, Marianne gained experience in cases involving:
In particular, she assisted him in respect of the construction of a professional indemnity policy in a dispute worth over £2 billion.
ILS (Executive Committee member)
COMBAR (Equality & Diversity Committee member)
University of Durham, BA (Hons) Philosophy, Politics and Economics (First Class)
College of Law, GDL and BPTC
King’s College London, LLM (Distinction)
Vicarious Liability: An Ever Expanding Concept? (ILJ (2016) 45 (4): 556-564)
Sexual harassment in the workplace (PILJ (June 2018) 7-9)
Various contributions to PLC Employment Blog
Inner Temple Exhibition Award 2013
Winner of BLS Debating Competition 2012