Bio

Helen Buchanan is a highly experienced tax partner who has been advising clients on complex UK and international tax issues across all sectors for over 25 years. She leads the global contentious tax practice and her contentious caseload spans: high-value disputes relating to the deductibility of payments in the UK and internationally, including unallowable and main purpose challenges; disputes regarding where tax is paid by multinational groups, covering permanent establishment, residence, transfer pricing, diverted profit tax (DPT) and controlled foreign company (CFC) risks; state aid and treaty-based litigation and arbitration; employment taxes (including off-payroll working); capital gains and transfer taxes on corporate transactions; VAT and other indirect taxes; tax fraud; as well as cross-border tax warranty and covenant claims. She has extensive UK and international litigation experience and, as a CEDR-accredited mediator, also has a strong track record of resolving cases out of court. Alongside her contentious practice, Helen brings a practical and risk focussed approach to a wide range of corporate and finance transactions, including M&A, joint ventures, securitisations, leveraged finance, debt restructurings and corporate reorganisations. Her sector experience includes energy and natural resources, infrastructure, TMT, pharmaceuticals, hospitality, retail and financial services. She is ranked in Band 1 for contentious tax by Chambers & Partners.