Brian O'Neill KC

Brian O’Neill KC

"Brian has a commanding presence and owns the courtroom: when he speaks, people listen."
"Brian is a true heavyweight. He is a clear, strategic thinker, which is essential in large-scale fraud cases, as well as a robust and persuasive advocate."

Legal 500 UK 2024
Year of call: 1987 KC: 2010
For enquiries please call: 020 7353 5324 or email vcard cv linkedin save

Criminal Defence

Brian is instructed in criminal cases of the utmost gravity and seriousness by leading defence solicitors. His vast experience has earned him the respect of those who instruct him, his peers and the judiciary.

He is regularly instructed in high profile murder cases and allegations involving serious sexual offences where his judicial experience as a former Recorder at the Central Criminal Court gives him a distinct advantage.

He has represented a number of Premiership footballers accused of serious violence, sexual assault and public order offences: out of respect for their privacy their names have been anonymised and media links removed.



M was charged with a gang related murder. The case against him hinged upon facial analysis evidence with supporting cell-site evidence. Upon Brian’s advice the prosecution and defence experts met in order to produce joint reports which resulted in the prosecution’s case that M was one of the suspects being greatly diminished. Following written representations to the CPS submitting that there was no longer a realistic prospect of conviction, the prosecution offered no evidence against M.


H was accused of two gang related murders. Following the service of the prosecution case Brian advised that an application to dismiss should be made. Upon receipt of the defence’s written submissions the prosecution discontinued the case against H in respect of all of the allegations which he faced.

AJ and others

AJ and seven others stood trial on four counts of murder. They were accused of firebombing the home of a man whom they suspected of having murdered a friend of theirs earlier that day, however, the wrong house was set alight killing a mother and her three teenage children. AJ was acquitted of murder and convicted of manslaughter.


Defence of a professional footballer accused with three other players of sexually assaulting a young woman in a hotel room. Brian’s client was acquitted of all charges. The solicitor for one of the co-defendants described Brian as “the stand out Silk in the case”.


Defence of a professional footballer accused of wounding a night club doorman with intent to do grievous bodily. Brian’s client was acquitted of all charges.

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