The brother of Manchester Arena bomber Salman Abedi is due to appear at Oxford Crown Court in front of a High Court judge this morning.
Hashem Abedi, 22, will appear before Mr Justice Sweeney for a bail hearing via videolink from HMP Belmarsh, a category A prison in south-east London.
Abedi, who was raised in Manchester, moved to Libya before his older brother detonated his suicide vest as pop fans left an Ariana Grande concert, killing 22 people and injuring 260.
Among the dead was Blackpool mum and school receptionist Jane Tweddle, 51. Other Lancashire victims included Georgina Callander, 18, Michelle Kiss, 45, and Saffie Roussos who, at just eight years old, was the atrocity's youngest victim.
Abedi is accused of making both successful and unsuccessful attempts to buy bomb-making chemicals.
It is also said Abedi assisted in buying a Nissan Micra to store device components, and that he made detonator tubes for use in the explosive.
He faces 22 counts of murder for each of the victims of the attack, one count of attempted murder encompassing all the other victims and one count of conspiring with his brother to cause explosions.
Abedi was arrested in Tripoli, but only extradited to the UK on Wednesday.
A preliminary hearing is due to take place at the Old Bailey on July 30.