It's taking place at Sheffield Crown Court.
The trial involving a Chesterfield man-who's accused of plotting a terror attack-is underway at Sheffield Crown Court.
Andy Star, who used to own the Mermaid Fish Bar, was arrested at his home on Sheffield Road back in December 2017.
He's charged with preparing to commit acts of terrorism.
Farhad Salah from Sheffield is also charged with the same offence.