Jason Mansell > Chambers of Mark Ellison QC > London, England > Lawyer Profile

Chambers of Mark Ellison QC
QEB Hollis Whiteman
Jason Mansell photo


Jason provides strategic advice and representation to firms and individuals facing investigation and potential criminal prosecution by the SFO and prosecution and/or disciplinary action by FCA and other regulatory bodies including the FRC. A formidable advocate, Jason has acted for firms and individuals in connection with over 100 FCA regulatory investigations and associated proceedings. He also acts for individuals and corporates in some of the more high profile and complex criminal prosecutions. Many of his cases result in no formal public action. Jason is currently acting for a CEO of a Bank in connection with alleged oversight failings, two individuals in connection with investigations by the SFO and FCA in relation to the alleged manipulation of LIBOR and EURIBOR, as well as numerous FCA investigations and proceedings for market abuse and breaches of FCA Rules and Principles. Past cases include FCA-v-Koutsogiannis (LIBOR investigation with no action taken), FCA-v-Chiesa, FCA-v-Capital Alternatives Limited (Court of Appeal), FCA-v-X Plc (listing rules investigation with no action taken). He also recently persuaded the RDC to revoke a prohibition order. Previous criminal instructions include R-v-Standard Bank PLC, R-v-Whelan (market manipulation), R-v-Norton Healthcare (price fixing) and Operation Tabernula (insider dealing). Jason also advises firms on compliance issues under anti-money laundering and anti-bribery legislation.


Called 1991, Lincoln’s lnn.


lnternational Bar Association, Association of Regulatory and Disciplinary Lawyers, Financial Services Lawyers Association.


Exeter school (1976-1987); Birmingham (1990, LLB hons).


Scuba diving, travel, swimming.

Lawyer Rankings

London Bar > Business and regulatory crime (including global investigations)

(Leading Juniors) Ranked: Tier 2

Jason MansellQEB Hollis WhitemanHe has a deep understanding of the law in this area and combines intelligence with commercial savvy.

London Bar > Financial services regulation

(Leading Juniors) Ranked: Tier 1

Jason MansellQEB Hollis WhitemanQuite simply what Jason doesn’t know about FCA litigation isn’t worth knowing – he is an absolute superstar with almost unrivalled expertise and great tactical acumen.