Billionaire Michael Platt Sues Tax Lawyer After Legal Setbacks

Oct. 1, 2025, 1:07 PM UTC

Michael Platt and his investment firm BlueCrest Capital Management, who have been in a long legal tussle with the UK tax authority, filed a lawsuit against their former lawyer, according to a court filing.

The suit, brought as a professional negligence claim and filed Sept. 29, names Malcolm Gammie, a senior tax lawyer, as a defendant. Gammie represented BlueCrest and Platt in a case involving the tax treatment of senior traders at the firm. While no further details of the current claim were available, Platt has fought a series of disputes with HM Revenue & Customs.

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