A 17-year-old boy told his friends he planned to attack fans at Oasis' first reunion concert as well as carrying out a Southport-style atrocity at a dance school, a court has heard.
The teenager, who cannot be named due to his age, allegedly researched how to get ahold of knives with one message sent to a friend, saying "would this work?" and accompanied by a photo of one online.
The prosecution told the court the youth, from near Cwmbran in South Wales, also spoken to his friends of a planned attack at the Oasis gig in Cardiff on July 4.
A note allegedly saved on his phone titled "places to attack" included a dance school near his home, and location data suggested he had been close to it only a few days earlier.
The court heard the youth also researched his own school as a potential target.
He had an appointment with a counsellor on June after his family had raised concerns where he spoke of plans to commit a "Rudakubana-style attack".
Axel Rudakubana was also aged 17 when he killed three girls aged six, seven and nine in a knife attack at a dance class in July last year. An inquiry into the killings started last week.
However, in this case, a court was told no evidence had been found to indicate the youth had an ideology that fit the legal definition of terrorism.
Southport attacker Axel Rudakubana
CPSThe Terrorism Act 2000 requires the use of threat of violence for the purpose of advancing a political, religious, racial or ideological cause.
The targeting of schools and misogynistic or incel (involuntary celibate) attacks aren't considered terrorist offences.
Neither are attacks motivated by self-aggrandisement or nihilism which means the youth suspect cannot be charged with preparing an attack.
The teenager was instead charged with, and has admitted, one count of possessing a document useful for terrorism - an offence Rudakubana received an 18-month sentence for, included in the 52 years he was imprisoned back in January.
The teenager allegedly planned to carry out an attack at the first Oasis reunion concert
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The prosecution told the court the youth's Snapchat account misspelled Rudakubana's name and he had researched the killer.
The court also heard that the teenager researched Rudakubana, saving images of him accompanied by words which were added that mocked the Southport victims.
It could also be heard that the youth discussed with other teenagers on the app which praised the 17-year-old killer and that he wanted to commit a similar attack.
One of the people who the youth was talking to then-reported him to police.
The teenager said he tried to make ricin - a poison Rudakubana manufactured - however, he told police this wasn't true.
A second report was made to police after praising Rudakubana in the appointment with the counsellor.
In the morning of the appointment, the youth researched knives and transferred an al-Qaeda training manual between phones.
He accepted that he had a copy of the same 188-page document found in Rudakubana's possession.
In appearing at Westminster's magistrate's court last month, Judge Justice Cheema-Grubb requested a pre-sentence report before asking for it to consider dangerousness.
She also requested for a psychiatric report on the youth.
The Times reported that the press had applied for restrictions on the naming of the 17-year-old to be lifted.
The matter was committed to crown court for sentence at a later date.