A man accused of threatening to kill Gordon Brown and Tony Blair in a posting on an extremist jihadi website has appeared in court via video link.
Ishaq Kanmi, 22, appeared at the Old Bailey with three other men also accused of terrorist offences.
Mr Justice Calvert-Smith told the court the men's trial was scheduled to begin at Preston Crown Court on June 3.
The four men, who are from Blackburn, were arrested at Manchester Airport and in Accrington, Lancashire, in August.
Mr Kanmi is accused of threatening to "eliminate" the prime minister and his predecessor Mr Blair in two online postings last January.
He is also accused of being a member of al-Qaeda and encouraging others to join the organisation.
Abbas Iqbal, aged 23, appeared alongside Mr Kanmi accused of spreading terrorist literature and owning terrorist materials, including camouflage equipment.
Mr Iqbal's brother, Ilyas, aged 21, also appeared accused of possessing terrorist material and conducting research into terror.
The fourth defendant, Muhammad Ahmad, aged 25, is accused of possessing terrorist materials, such as camouflage clothes and plans for "urban combat".
None of the defendants entered a plea at the one-hour hearing.
A date for a plea and directions hearing will be set next week.