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Dean Armstrong QC is widely considered to be one of the top-rated Insider Trading barristers in the UK. He spent the early portion of his career working in the City with financial institutions, and uses this knowledge to devastating effect when defending clients  accused of this crime.




Indeed, Dean advised a city institution with respect to the major changes introduced by the Financial Services Act (as it was known then).

Understandably those who work in that industry are often frustrated when they are subject to investigation for what they regard as perfectly legitimate working practices.

Dean’s unique experience means that he can immediately see and understand this frustration and he has been, and is, able to unravel and arrive at the real situation. This leads to the problems either being satisfactorily resolved or, failing that, being met by a forceful, effective defence.

He is someone who can achieve the desired result based on his ability to speak the language of the City professional. This practical approach ensures that Dean doesn’t need long to get to the heart of an insider trading problem. He understands that information can come in to the possession of City professionals in all different ways, clearly not all of them involve wrongdoing. What Dean believes sets him out from others is the ability to understand and see quickly where the line is and to be able to effectively advise accordingly.

Dean is often retained in circumstances where companies and/or individuals seek advice over matters which are not, at that stage, subject to any formal investigation.

As one of the top-rated insider trading barristers and QC’s, Dean’s approach is to pro-actively address and engage the matter, rather than waiting for “a knock at the door”.

In this way, should the worst happen and a formal investigation ensue, internal or external, a tactically judged path will already have been taken by one of the UK’s top-rated insider trading barristers.

Notable Insider Trading Case

Defendant accused of manipulation of markets

Legal argument.

Case dropped by the prosecution



Dean Armstrong QC speaking about his approach to Appeals.

See how Dean Armstrong QC approaches asset confiscation.


As a former City Legal Advisor, Dean explains his approach to Tax Evasion charges.

With his unique Financial Institution background, Dean speaks about Money Laundering.


See Dean speak about building a powerful defence for those accused of VAT Fraud.


Watch one of the UK’s leading cybercrime barristers speak about this troubling yet fast growing area of law.


A class act with devastatingly
effective powers of cross-examination
The Legal 500