In September, it was reported that a 19-year-old appeared in court, accused of plotting to carry out a terror attack on Oxford Street shoppers and an Elton John concert in London.
Haroon Ali-Syed allegedly tried to buy weapons online.
Westminster Magistrates Court was told he did so with a view to carrying out attacks in busy areas of the capital.
Syed reportedly researched targets including an EJ concert in Hyde Park on September 11, Buckingham Palace, Oxford Street and military bases in London.
At the Old Bailey court in London, he acknowledged “researching, planning and attempting to source” materials for homemade explosive devices for use in the attacks.
Syed, warned by the judge that a life sentence is likely to be handed down, will be sentenced in June after a probation and psychiatric report.