Jon Harrison specialises almost exclusively in Criminal Defence work. He is an experienced jury advocate and represents clients in all aspects of general criminal work including serious violent and sexual offences, armed robbery, organised crime, public order offences, immigration offences, financial crime/fraud, copyright & trademark offences.

Jon has been led as junior counsel in numerous high profile cases involving kidnap/blackmail; international fraud and large scale drugs conspiracies.

Jon has advised and represented clients in a number of cases on appeal of both sentence and conviction.

He has experience in cases which require the cross examination of vulnerable and young witnesses and has also defended clients with serious mental health issues. Jon has a wide range of experience in dealing with young offenders.

He also advises clients on potential civil actions against the police.


The Criminal Bar Association.

Further Professional Information

Jon has given lectures and presentations to students and pupil barristers who are about to start practice on behalf of Middle Temple. In addition he has provided teaching in CPD accredited courses to established practitioners on various aspects of the Criminal Law including the presentation of mitigation pleas, bad character applications and general advocacy.


Plays rugby (representative honours in both codes), football, reading.

Practice Areas


R v Lacey & Others (Allegations of false imprisonment; blackmail and possession of firearms involving an attempt to force the resignation of the managing director of QPR football club);

R v Tully & Wood [2006] EWCA 2270 (case where the court appeal issued guidance for judges when considering bad character applications)

R v Moran [2010] (successful appeal in relation to mitigation that can be derived when the defence of duress has not succeeded)

R v Whelan [2010] (successful appeal against sentence for getaway driver of jewellery thieves- sentenced reduced by 1/3)

R v SJ (allegation of gang related stabbing of rival postcode gang member)

R v JRAF (allegation of a barman accused of rape whilst working in a public house)

R v Aristides (Daytime Smash and Grab Robbery that was obstructed by members of the public)

R v GF (allegation of a rugby player accused of an on-field assault resulting in a broken jaw)

R v Simon-Michael (appeared as junior in 2 million pound advanced fee fraud)

R v JJ & another (successful submission of no case to answer in a consent rape case)

R v Duong (conspiracy to produce cannabis on industrial scale encompassing over 20 properties including warehouses and factories)

R v Yousef (2005) CA (recommendation for deportation quashed against Asylum Seeker)