Harrison Swift Accountants in Westminster, London
About
Harrison Swift is an independent firm specializing in private client US & UK Tax. We offer a highly experienced and professional level of tax advice with a bespoke and personal touch. We are small by design – so you will always have the full attention of a dual qualified US and UK advisor handling your tax work. With over 19 years of dual US and UK tax experience, our team provides big four foundation with an entrepreneurial track record.
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Location
71-75 Shelton St, Westminster WC2H 9JQ
Get directionsCompany history
Registered with Companies House
- Registered name
- HARRISON SWIFT LTD
- Company number
- 15044970
- Incorporated
- August 2023 · 3 years
- Company type
- Private limited company
From the Companies House register, checked 1 Nov 2026.
Founded by a Big Four-trained tax specialist
Harrison Swift was founded by Tom Griffiths, who previously built Ingleton Partners before selling it to an employee ownership trust, and earlier held roles at Grant Thornton, KPMG and PwC specialising in high-net-worth and cross-border tax.
Dual US and UK qualified
The firm operates as an Enrolled Agent authorised to practise before the IRS and an Authorized IRS e-file Provider, with membership of the Association of Taxation Technicians in the UK and the National Association of Enrolled Agents in the US.
A boutique firm by design
Trading as Harrison Swift through Oak Tree Taxation Ltd, incorporated in July 2023, the firm keeps its client list small so that private clients get direct, hands-on guidance from a dual-qualified US and UK adviser rather than being passed between teams.
From Company website - About and Companies House. Checked 3 Oct 2026 by our moderator.
