Thomas Cassels

Tom is a commercial litigator specialising in high stakes and crisis litigation, including public law and funded competition litigation. He is ranked in leading legal directories such as Chambers UK, Chambers Europe, Chambers Global and The Legal 500. He has won industry awards from the Lawyer and Legal Business and was twice included in The Lawyer “Hot 100”.

Tom works in close collaboration with lawyers from the firm’s other market-leading practice areas, including AFIG, Corporate, Projects and TMT in cross-office, multidisciplinary teams.

Chambers Review

Provided by Chambers

UK

Competition Law: Litigation - London (Firms)

Band 1

Individual Editorial

Thomas Cassels is well regarded for defending clients in competition damages claims, including acting in high-profile collective action proceedings. He also represents clients in challenges to CMA decisions and applications to strike out damages claims. He acts as the head of the firm's competition litigation practice.

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Administrative & Public Law - UK-wide

Band 1

Individual Editorial

Thomas Cassels is a dispute resolution partner at Linklaters. He is noted for his experience handling high-profile judicial reviews and public inquiries.

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Sport - UK-wide

Up and Coming

Individual Editorial

Tom Cassels is a market-leading competition lawyer and commercial litigator with a sector specialism in sport. He is also instructed for disciplinary and regulatory matters.

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Strengths

Provided by Chambers

He is up there with the greats. He has probably more experience of competition litigation than anyone else in the field, has absolutely impeccable judgement and is always there with the wisest advice.

Competition Law: Litigation respondent
UK

Thomas Cassels is highly sophisticated, thoughtful, considered, commercially astute and vastly experienced. He is at the top of the premier league in his field and his quality shines through.

Competition Law: Litigation respondent
UK

His calm and thoughtful approach to even the most challenging cases ensures the best possible outcome for the client.

Competition Law: Litigation respondent
UK

Thomas Cassels is an outstanding partner who is probably one of the top antitrust lawyers in the UK. He is always available when we need him and his opinions and advice are superb.

Competition Law: Litigation respondent
UK

Thomas Cassels is a hugely experienced litigator and very effective at boiling down issues to the key logical points of an argument.

Competition Law: Litigation respondent
UK

Thomas has a wonderful ability with clients.

Administrative & Public Law respondent
UK

He is a chameleon. He can adapt to situations but he is always measured and fair.

Administrative & Public Law respondent
UK

Thomas Cassels is hardworking and knowledgeable. He has incredible judgement.

Administrative & Public Law respondent
UK

Tom Cassels gets on top of extremely complex issues very quickly. Further to his legal acumen, he knows the industry and provides extremely commercial advice.

Sport respondent
UK

Competition Law: Litigation respondent
UK

Thomas Cassels is highly sophisticated, thoughtful, considered, commercially astute and vastly experienced. He is at the top of the premier league in his field and his quality shines through.

Competition Law: Litigation respondent
UK

His calm and thoughtful approach to even the most challenging cases ensures the best possible outcome for the client.

Competition Law: Litigation respondent
UK

Thomas Cassels is an outstanding partner who is probably one of the top antitrust lawyers in the UK. He is always available when we need him and his opinions and advice are superb.

Competition Law: Litigation respondent
UK

Thomas Cassels is a hugely experienced litigator and very effective at boiling down issues to the key logical points of an argument.

Competition Law: Litigation respondent
UK

Thomas has a wonderful ability with clients.

Administrative & Public Law respondent
UK

He is a chameleon. He can adapt to situations but he is always measured and fair.

Administrative & Public Law respondent
UK

Thomas Cassels is hardworking and knowledgeable. He has incredible judgement.

Administrative & Public Law respondent
UK

Tom Cassels gets on top of extremely complex issues very quickly. Further to his legal acumen, he knows the industry and provides extremely commercial advice.

Sport respondent
UK

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London (Firms)

Banking & Finance: Big-Ticket

Nick Syson

Band 2

Thomas Cassels

UK Guide 2025

Competition Law: Litigation + 2 more rankings

About

Practice Areas

Chambers Review

UK

Competition Law: Litigation - London (Firms)

Individual Editorial

Administrative & Public Law - UK-wide

Individual Editorial

Sport - UK-wide

Individual Editorial

Strengths

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London (Firms)

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