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Simon Whitehead

Work 020 7851 8800
Joseph Hage Aaronson LLP

Work Department

Consultant; Tax Disputes


Simon was a founding partner of the firm. He has more than 30 years of litigation experience and has spent more than 15 years exclusively focusing on contentious tax, mostly in direct tax and particularly corporation tax.

Simon has been selected as the lead and test-case solicitor in most group litigation orders in the Chancery Division of the High Court, in which multinational company groups challenge the lawfulness of various UK corporate tax imposts. He established the first ever Group Litigation Order in the Administrative Court, which successfully challenged HMRC’s practice in assessing the tax transfer of pension savings to foreign pension funds.

He also represents UK tax payers, including high-net-worth individuals, on tax investigations and disputes at every level of the UK Courts and he has also appeared before the CJEU


Admitted as a solicitor of the Australian Federal Court and High Court

Admitted as a solicitor in England and Wales

Admitted as a solicitor in New South Wales

Member of the Law Society of England and Wales

Member of the Law Society of New South Wales


University of Sydney - PhD

University of Sydney - LLB

University of Sydney - BA (first class honours)

London: Dispute resolution

Tax litigation and investigations

Within: Leading individuals

Simon Whitehead - Joseph Hage Aaronson LLP

Within: Tax litigation and investigations

Tax litigation boutique Joseph Hage Aaronson LLP is noted for its dominant position in the UK tax disputes market, enabled by its concentration of 'star individuals'. The group, which combines expertise from the Bar alongside solicitors and other experts including forensic accountants, handles complex domestic and cross-border tax disputes across a range of industry sectors for clients including Marks & Spencer,  Exxon and Sony. Founding partner Graham Aaronson QC leads the tax litigation tea, and specialises in commercial taxation - with a particular focuses on transfer pricing, oil and gas tax, life assurance office tax, structured finance, EU law and state aid. Vastly experienced Simon Whitehead is often instructed on contentious corporation tax matters, while Paul Farmer stands out for work involving European law and international tax. The group is currently representing British American Tobacco in the test case in the FII Group Litigation, which comprises 25 long-running claims by UK-headquartered multinationals challenging the UK's dividend taxation scheme and related issues. It is also acting for Prudential as the test claimant in the CFC and Dividend Group litigation, challenging the lawfulness of the UK's taxation of portfolio dividends and pension fund income. Other key names include Daniel Margolin QC, Michael Anderson, Ray McCann and 'solution-oriented' senior associate Helen McGhee who is singled out for her expertise in technical trust and offshore company matters. Former associate Philippe Freund joined Fieldfisher at partner-level in July 2018.

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United Kingdom: Tax (3rd edition)

October 2018. By Simon Whitehead, Partner

This country-specific Q&A provides an overview to tax laws and regulations that may occur in the  United Kingdom . It will cover witholding tax, transfer pricing, the OECD model, GAAR, tax disputes and an overview of the jurisdictional regulatory authorities. This Q&A is part of the global guide to Tax. [Continue Reading]

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