Naa & Imam Zakariyah Rahman, 20, of London, was arrested last week and charged Tuesday. A second man, Mohammed Aqib Imran, 21, of Birmingham, appeared before the court at the same time, also accused of "intent to commit acts of terrorism".
According to court documents, Rahman planned to detonate an explosive device at the doors of Downing Street and then try to gain access to the n. ° 10 – official residence of May – "in the ensuing chaos with a view to trying to kill the prime minister".
"The secondary attack on No. 10 was to be carried out with a bulletproof vest, a pepper spray and a knife," the document said. Rahman had carried out a "hostile reconnaissance" of the area as part of his preparations and revealed his plan to "attack, kill and cause explosions" in several recorded conversations, according to the allegations.
In a related indictment, Imran is accused of trying to obtain a false passport to leave the UK and travel to Libya.
The attorneys for Rahman and Imran did not include "any indication" as the suspects, which means that the case continues as if they had pleaded guilty "not guilty".
Both suspects have been detained without bail and will appear in court on December 20.
The terrorist threat from the United Kingdom by Islamist terrorists is operating "on a scale and at a pace we have not seen before," said Andrew Parker, director general of MI5, in a speech in October. He warned that "the challenge we are facing is undoubtedly crude, more threatening, that attacks us more quickly and, at times, is more difficult to detect, but it is a challenge that we and our partners face and face." 19659002]
More than 500 anti-terrorist investigations
"On two separate occasions in the months prior to the attack, MI5 received information, the significance was not fully appreciated at that time," the report said.
The report noted that although the anti-terrorist police and MI5 had been successful in most things, "it is conceivable that the Manchester attack in particular would have been avoided if the cards fell." in a different way "
" There are just over 500 antiterrorist investigations, involving more than 3,000 subjects of interest, along with a growing group of more than 20,000 people who have previously been the target of terrorism investigations, "the statement said.
" These investigations cover the entire range of terrorist activity, from the planning of an attack to the activity that supports or facilitates terrorism, but a significant proportion implies possible threats of attack planning. The pace is more intense than ever. "
CNN's Hilary Clarke contributed to this article.