Jury Act 1977

If a juror dies, or the court or coroner discharges a juror in the course of a trial or coronial inquest, the court or coroner must—

discharge the jury if the court or coroner is of the opinion that to continue the trial or coronial inquest with the remaining jurors would give rise to the risk of a substantial miscarriage of justice, or

if of the opinion that there is no such risk and subject to section 22, order that the trial or coronial inquest continue with a reduced number of jurors.

A court or coroner that discharges a jury under subsection (1) (a) may stay the proceedings on such terms as the court or coroner thinks fit if a party gives notice of an intention to lodge an application for leave to appeal for review of the decision under section 5G of the Criminal Appeal Act 1912.

Where a jury in civil proceedings is discharged under this section, the proceedings may, without any new process for that purpose, be set down for trial either at the same or any subsequent sittings, as the court may order.