It's still going on:

Fourteen-year-old boy charged with plotting terror attack

https://www.theguardian.com/uk-news/2020/jun/17/fourteen-yea...

[Alice in wonderland is secret code for a terror attack.]

Teenage girl found guilty of plotting terror attack in London

>> Safaa and Rizlaine Boular discussed the attack in a coded conversation – played to the court – about an Alice in Wonderland-themed party.

>> In a recording, Rizlaine Boular said she wanted to have “an English tea party kind of thing, little tea cups, tea cakes and stuff”, and Safaa Boular suggested an Alice in Wonderland theme, saying: “You can be the Mad Hatter ‘cause your hair’s crazy. You can have cucumber and butter sandwiches.”

>> Around the same time, Dich and Rizlaine Boular travelled around various landmarks in London, which was believed to be a reconnaissance of potential targets. The following day, they went to a supermarket on Wandsworth Road and purchased a packet of kitchen knives and a rucksack.

(...)

>> “This was without doubt a major investigation for the counter-terrorism command working jointly with the security service,” said Dean Haydon, the Met’s senior national coordinator for counter-terrorism.

>> “Not only because it involved a family with murderous intent, but because it is the first all-female terrorist plot that’s been launched in the UK related to Daesh [Isis].”

https://www.theguardian.com/uk-news/2018/jun/04/teenage-girl...

[A columbine style attack is planned by teenagers aremed with a rucksack containing stones, batteries, ~50g of screws and matches. And a bottle of Head & Shoulders shampoo.]

Boys given 10 and 12 years for Columbine-style plot in Yorkshire

>> Police spoke to both boys separately at home after the incident. Bolland confirmed they “planned to go into school with a firearm in order to get rid of those who had wronged them”, but Wyllie denied everything.

>> A month later, detectives seized the latter’s diary and found a rucksack in his hideout containing a balaclava, a bag of screws, cable ties and a bottle of flammable liquid. He told police he had the items so he could run away with his girlfriend. He denied planning to kill her parents or pupils and teachers at his school.

(...)

>> Prosecutors said North Yorkshire police did not respond adequately to the threat until a specialist counter-terrorism team took over the investigation a month later. Phil Cain, assistant chief constable, admitted their investigation fell below standards and that a review had taken place.

https://www.theguardian.com/uk-news/2018/jul/20/two-boys-giv...

(The damning evidence: https://www.theguardian.com/uk-news/2018/jul/20/two-boys-giv...)

[A terrorist assembles a terror kit containing a knife, a hammer and a suicide note.]

Ordering Gunton, who suffers from an autism spectrum disorder, to be detained at Her Majesty’s pleasure, the judge Mark Wall QC, told the former A-level student: “The police found a rucksack in your room which contained a knife, a hammer and what has been referred to as a suicide note or a martyrdom letter. In the martyrdom letter you referred to yourself as a ‘soldier of Isis’.

“The letter was written in such terms that it was obviously to be found and read after you had carried out a terrorist attack.”

The judge described the items found in the rucksack as a “terrorist’s kit” and said it was clear from Instagram posts in English and Arabic that Gunton, who lived on a farm, had planned to launch an attack.

https://www.theguardian.com/uk-news/2018/mar/02/teenager-llo...