James acts for the prosecution and defence in all proceedings in the Crown Court, including jury trials, sentencing hearings and confiscation proceedings. He has also appeared at the criminal division of the Court of Appeal in appeals against conviction and sentence.
James has represented the defence in a wide spectrum of criminal allegations, including kidnap, robbery, firearms and drug trafficking offences. He also acts in serious offences of fraud and dishonesty including conspiracy to defraud, blackmail and perverting the course of justice. James also represents defendants in cases of sexual offences, including those which involve historic allegations.
In 2016 James was instructed as junior counsel for the defence in two separate cases of murder.
James is regularly instructed by Swansea city council to prosecute fraud and consumer protection offences investigated by Trading Standards officers.
James has successfully represented the police and members of the public in appeals against revocations of firearms certificates. He has also appeared before the Parole Board to represent prisoners recalled by the Secretary of State in appeals against the revocation of their licences.
- R v Akinsete (2012): represented the defendant in a heroin/cocaine supply trial, subsequently appealed in the Criminal Division of the Court of Appeal and reported as R v Akinsete  EWCA Crim 2377, a leading authority on the definition of the meaning of “being concerned” in the supply of controlled drugs
- R v Lowndes (2013): represented the defendant at the Criminal Division of the Court of Appeal in an appeal against sentence where the trial judge had impermissibly treated lies told by the defendant as an aggravating feature. The appeal was allowed and sentence reduced. Reported as R v Lowndes  EWCA Crim 1747
- R v Westwood (2013): represented the defendant in a matter originally charged and sent to the crown court as attempted murder but tried for wounding with intent. The defendant was acquitted by the jury
- R v Stanlake (2013): represented an employee of a football club, charged with multiple counts of false accounting involving the alleged theft of a substantial amount of cash. The defendant was acquitted by the jury
- R v Gilheaney (2016): represented the first named defendant in a 16-defendant drugs conspiracy. Following a successful submission at the close of the prosecution case that there was no case to answer, the defendant was acquitted on the direction of the trial judge