Two teenagers - including one from west Yorkshire - have appeared at the Old Bailey accused of preparing terrorist acts.
Al-Arafat Hassan, 19, and a 15-year-old boy are each charged with a single count of preparation of terrorist acts.
The youth, from Leeds, is accused of the research and purchase of knives and online research to acquire components for an explosive device between January 9 and March 20.
Hassan, from Enfield, north London, allegedly bought knives, acquired chemicals and conducted online research to acquire components for an explosive device: Hassan is alleged to have prepared terrorist acts between January 12 and February 27.
The defendants appeared at the Old Bailey by video link from custody on Friday.
Mr Justice Sweeney set a provisional trial at Leeds Crown Court on October 4.
A plea hearing will take place on July 29.
The defendants were remanded into custody.
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