Sebastian Allen

Practice Overview

Sebastian is ranked as a “leading junior” with a substantial litigation practice in commercial and chancery law.

The legal directories have described him as being “technically very able”, with a “massive brain” and a “sharp intellect”, as well as being “very personable, client-friendly and hard-working”, with “strong advocacy skills” and a “fantastic manner with clients”.  He is a “highly popular choice of junior” who is not only “always approachable”, “clear-headed” and “very practical”, but who also “instils complete confidence in clients”.

Sebastian is a particularly strong advocate who specialises in company, commercial, fraud, insolvency, pensions, professional negligence and trusts law.

He has considerable experience acting across a wide range of matters both on his own (including against Leading Counsel) and as part of a wider team led by Leading Counsel within and outside Chambers.  He appears regularly in the High Court and the Court of Appeal, representing clients in interim and final applications, as well as at trial and on appeal.

Sebastian is frequently instructed on large and complex multi-party litigation, often with an international element, and has experience acting with multi-jurisdictional teams.  He also has extensive experience advising and acting in relation to large regulatory investigations, including cases involving the Financial Conduct Authority, the Pensions Regulator, the Financial Reporting Council and the Institute and Faculty of Actuaries.

Sebastian has been ranked as “highly-commended” in Legal Week’s “Future Stars of the Bar”.