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Lydia Challen

Partner

London

Challen Lydia
Lydia Challen

Partner

London

Lydia specialises in all aspects of corporate tax, including M&A, corporate reorganisations and private equity tax. She regularly advises multinational corporate groups in relation to their tax affairs and on structuring issues. On the transactional side, she has extensive experience of advising in relation to disposals by public and private companies, complex financings (including restructurings) and corporate reorganisations.

She co-chairs the Tax Committee of the Law Society of England & Wales. She is a regular contributor to consultations with HM Revenue & Customs and the UK Treasury on the development of legislation and tax policy.

Lydia is ranked as a Leading Individual in Legal 500’s category, Corporate Tax 2021/22.

"Very knowledgeable, smart and straight to the point." Chambers & Partners, UK.

"A joy to work with and exceptionally good." Chambers & Partners, Europe.

News & insights

A coal power plant in Vietnam

Publications: 21 OCTOBER 2021

Indonesia passes carbon tax bill as part of GHG regulation effort

There are two important legislative developments in Indonesia as the country attempts to meet its obligations under the Paris Agreement. Indonesia’s House of Representatives (Dewan Perwakilan Rakyat…

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Processor on motherboard

Publications: 22 JULY 2021

OECD Pillars, the digital economy and minimum taxes

To date, 132 jurisdictions have committed to the OECD’s two-pillar plan to reform international tax rules, as set out in its statement of 1 July 2021.  Although the genesis of the proposed reforms…

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windows

Publications: 04 JUNE 2021

Global Tax Insights: Uncertain tax positions: preparing for further tax disclosure

The UK government is pressing ahead with its proposal to require large businesses to notify their “uncertain tax positions” to HMRC.

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Person handling documents

Publications: 12 JANUARY 2021

Brexit certainty at last? An overview of the new EU-UK trading relationship

Following months of protracted negotiations and coming four and a half years after the UK voted to leave the EU, 24 December 2020 saw the EU and UK finally agree the shape of their future…

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Office

London

Allen & Overy LLP
One Bishops Square
London
E1 6AD

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Qualifications

Professional

Admitted as barrister, England and Wales, 1995

Admitted as solicitor, England and Wales, 2007

Academic

Bachelor, University of Cambridge, 1993

Master, Oxford University, 1994

Fraudulent emails

Please note there is a known fraud/scam currently using the Allen & Overy brand and Lydia Challen's name.

More information on fraud using the Allen & Overy brand can be found here.