Helen McGhee > Joseph Hage Aaronson LLP > London, England > Lawyer Profile

Joseph Hage Aaronson LLP

Work Department

Tax Disputes (Private Client)


Helen has been with Joseph Hage Aaronson as a Senior Associate and Chartered Tax Adviser in the London office since 2016. Helen cut her teeth in the field of contentious tax in the Supreme Court as the lead associate in the acclaimed residence case of Gaines-Cooper v HMRC. She now specialises in pre-litigation settlement strategy liaising with HMRC to reach a mutually agreeable resolution to long running tax disputes primarily acting for internationally mobile high net worth individuals. Most recently she has settled a number of domicile enquiries, concluded complex COP9 settlements, advised in relation to complex UK remittance issues, and acted as an expert witness in relation to tax issues in divorce proceedings.

Helen was awarded the 2015 Taxation Rising Star accolade and was named one of Eprivate Client’s top 35 under 35. This year, since returning from 2 successive periods of maternity leave, Helen has been named as a Rising Leader in the Private Client Global Elite 2022/23 Directory and appeared in the Citywealth Top 100 Private Client Lawyers leaders list.

Helen frequently writes for Tax Adviser, Tax Journal and other tax publications. She also edits chapters for the acclaimed Bloomsbury Professional publication Revenue Law: Principles and Practice.

Clients say of her:

Her judgement is razor sharp. Under immense time pressure and navigating complex rules, she speedily formed her opinion, liaised with hostile opposition, and closed the deal in a smart and flexible manner.

The advice Helen provided me with on my technical international tax issues was unbelievably thorough. It put my mind at rest that she did not leave any stone unturned. HMRC interviews were never stressful as Helen was always completely in control.


Trained at Hammonds LLP (since become Squire Patton Boggs LLP) qualified as a solicitor in 2009.

Qualified as a Chartered Tax Adviser 2012 and a STEP member 2015.

New Quadrant Partners 2015-2016

Joseph Hage Aaronson LLP 2016- present

CEDR accredited 2016.


Chartered Institute of Taxation (Membership Committee and Dispute Resolution and Litigation sub-group)

Society of Trust and Estate Practitioners (STEP)

Centre for Effective Dispute Resolution (CEDR) Accredited Mediator

Worshipful Company of Tax Advisers

Tax Investigations Practitioners’ Group


Cardiff Law School

University of Reading and University of Maastricht LLB Law with Legal Studies in Europe