Department profile
A&O Shearman

Tax

UK Guide 2026 : London (Firms)


A&O Shearman

Rankings

About

Provided by A&O Shearman

A&O Shearman’s UK tax practice advises on complex domestic and international tax matters across the full range of corporate and financing transactions. The team has extensive experience advising on the tax aspects of public and private M&A, joint ventures, capital raisings, capital markets and structured finance transactions, as well as private equity, funds and other private capital investments, real estate transactions and restructurings.

Sitting at the centre of the firm’s global platform, the London tax team regularly leads sophisticated, multi‑jurisdictional mandates, working closely with colleagues across Europe, the U.S. and Asia to deliver integrated, commercially focused tax advice on high‑value cross‑border transactions. The practice acts for multinational corporates, leading private capital sponsors and institutional investors, and tier‑one financial institutions on matters spanning the full deal and business lifecycle.

The team is also at the forefront of advising clients on the implications of evolving international tax frameworks, including OECD Pillar Two, supporting multinational groups and financial institutions in navigating increased complexity, regulatory change and global tax reform. Clients value the team’s ability to combine deep technical expertise with a pragmatic, commercial approach, particularly on transactions involving multiple tax regimes and jurisdictions.

Chambers Review

Provided by Chambers

Tax - London (Firms)

Band 2

Band 2


What the Team is Known For

A&O Shearman has a strong reputation across a broad range of corporate tax work, including matters relating to M&A, capital markets and real estate. The team is renowned for its work with both banks and corporations on domestic and cross-border matters. Its large international network allows the team to service clients at a global level.

Work Highlights

Provided by Chambers

  • A&O Shearman advised Lone Star regarding its partnership with Ares Management on a £755 million preferred equity investment into Quintain.

Strengths

Provided by Chambers

  • A&O Shearman is able to cut through the great detail of our transactions and the complexity of the matters involved to address the important issues at hand with clarity.

    Tax respondentUK
  • A&O Shearman provide high-quality solutions to extremely difficult matters. They have a very strong team and are always available and responsive.

    Tax respondentUK

Notable Practitioners

Provided by Chambers

  • Band 1Lydia Challen
    Band 1Lydia Challen

    Lydia Challen

    Lydia Challen has a strong tax practice that sees her advising clients in the financial services sector on a range of challenging transactions. She regularly works with banks, insurance companies and investment managers.
    • Lydia is excellent. She is very thorough, very diligent and very good.

      Tax respondentUK
    • Lydia is very sharp and provides clear advice on complex tax matters.

      Tax respondentUK
    • Lydia is truly fantastic. She is extremely clever, quick and creative, but also very practical and commercial. She is a pleasure to work with.

      Tax respondentUK
  • Band 2James Burton
    Band 2James Burton

    James Burton

    James Burton is recognised for his work on corporate and real estate-related tax issues. He works for clients including investors and investment funds on issues such as real estate acquisitions.
    • James is practical and fantastic to work with. He is really good at taking complicated concepts and explaining them to me in straightforward way.

      Tax respondentUK
    • James provides excellent advice.

      Tax respondentUK
  • Band 4Charles Yorke
    Band 4Charles Yorke

    Charles Yorke

    Charles Yorke frequently works for large clients in the banking sector on financing transactions. In addition to his deal work, Yorke also assists clients facing investigation by HMRC.
    • Charles is very responsive, creative and commercial. He's very smart and extremely proficient technically.

      Tax respondentUK
  • Band 5Christopher Harrison
    Band 5Christopher Harrison

    Christopher Harrison

    Christopher Harrison is global head of A&O Shearman's tax practice. He is well known for handling the tax aspects of corporate restructuring, refinancing and acquisitions.

Ranked Individuals at A&O Shearman (4)

London (Firms)

Members

Provided by A&O Shearman

A&O Shearman has rankings in the following guides

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