The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon
Work 0207 851 8888

Simon Whitehead

Work 020 7851 8800
Joseph Hage Aaronson LLP


Simon Whitehead has over 25 years’ litigation experience, practising in London since 1991. For the past 15 years he has practised exclusively in the area of contentious tax disputes, mostly in areas of direct tax 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 of England and Wales in which multinational company groups challenge the lawfulness of various UK corporate tax imposts. These include the ACT Group Litigation, the Loss Relief Group Litigation, the CFC and Dividend Group Litigation, the Thin Cap Group Litigation, and the FII Group Litigation. He also represents high net worth individuals in their UK tax investigations and disputes. In 2012 he was also selected as lead and test case solicitor in the personal tax group action, the ROSIIP Group Litigation, which successfully challenged HMRC’s practice in assessing to tax transfers of pension savings to foreign pension funds.

London: Dispute resolution

Tax litigation and investigations

Within: Leading individuals

Simon Whitehead - Joseph Hage Aaronson LLP

Within: Tax litigation and investigations

Joseph Hage Aaronson LLP is considered by some as the ‘pre-eminent firm for tax litigation in London, and, indeed, in the UK more generally’. The group is made-up of ‘phenomenal’ silks, experienced partners and forensic accountants, who have experience of UK and EU tax litigation and particular strength in corporation tax group litigation orders. The ‘technically superbSimon Whitehead and Paul Farmer, who is ‘an expert on European tax law’, acted for British American Tobacco in the long-running test case for the FII Group Litigation, which challenged the UK’s dividend tax and advance corporation tax on UK-headquartered multinationals which source profits abroad; the firm’s own Graham Aaronson QC and Tom Beazley QC handled the advocacy in the case. The team is regularly involved in topical and politically-charged tax-related cases and has been instructed by such public figures as David Cameron. Joint founding partner Michael Andersoncombines technical acumen and commercial understanding’ and Daniel Margolin QC is another key contact in the tax litigation group. In 2016, the firm welcomed Ray McCann from New Quadrant Partners LLP and also added three chartered accountants to the forensics team. Other significant clients include Marks & Spencer, Prudential Assurance, Europcar and InterContinental Hotels Group.

[back to top]

IHL Briefings

If your firm wishes to publish IHL Briefings or articles, please contact Antony Dine on +44 (0) 207 396 9315 or


United Kingdom: Tax

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]

Back to index

Legal Developments in London

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to
  • The legal difference between a consultant and an employee according to Nicaraguan Law

    Knowing the legal difference between a consultant and an employee is important for a company that needs to hire someone in Nicaragua or for a person interested in rendering services for a company or another person, due to the fact that the nature of the contractual relationship will determine many factors that both parties must be aware of before executing the contracting modality that will govern the relationship between them - the nature of the contractual relationship impacts on the employment benefits, tax implications and liabilities that the parties must comply with according to the law.  labor_law_in_nicaragua
  • Single director - shareholder Companies according to the Nicaraguan legal system

    What is a Single Shareholder and Director legal entity?
  • Business in Nicaragua- The Most Important Changes in the Recent Tax Reform

    In recent years, the country ́s the government has been committed to improving Taxation in Nicaragua and attempting to follow the legislative model used by some of the other countries in the region. Starting January 1st, 2013, a new tax law (Law No. 822, Tax Concertation Law) came into force in and completely changed the taxation system in Nicaragua. Two years later a new law was issued by the National Assembly containing more than 80 amendments, additions and repeals (Law No 891) which came into force December 18th, 2014.