John Oliver

Year of Call: 2008

John is a barrister specialising in criminal and extradition law.

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John specialises in crime and extradition.


John has particular experience in cases involving drugs, sexual offences (including historic allegations), serious violence and dishonesty. 


He has an interest in cases involving vulnerable defendants and witnesses and has been instructed in cases involving the use of intermediaries to assist defendants with Autistic Spectrum Disorder and those with mental health conditions.


Professional Panel Appointments


  • John is an appointed level 2 CPS Prosecutor.

Extradition & International + View All Specialist Areas

John is an experienced extradition practitioner, having represented many requested persons at first instance and on appeal.  

Cases of Note

R v W

Successful defence of a female jointly accused of grievous bodily harm (s.18) during an alleged knife attack on a neighbour.

R v A

Successfully defended a young man charged with sexual assault. His co-defendant was accused of rape on the same occasion.

R v W

Representing a young defendant with Autistic Spectrum Disorder in relation to a charge of assault with intent to commit a sexual offence (acquitted)

R v K

Instructed alone in a multi-handed conspiracy to convert criminal property involving the sale of appliances stolen from hardware stores across the country.

R v Oryem [2016] EWCA Crim 1699

Successful appeal against conviction and sentence for offences of fraud, possession of articles for use in fraud and possession of a false identity document with intent.

R v El Sheikh [2015] EWCA Crim 718

Successful appeal against sentence for possession of a prohibited firearm.