A former grocery store employee was inspired by an AI "chat bot" in a "Star Wars-inspired" plot to kill Queen Elizabeth II, a courtroom has heard.

Jaswant Singh Chail, 21, was carrying a hand-crafted steel masks and armed with a loaded crossbow when he scaled the perimeter of the Windsor Castle grounds on Christmas Day 2021.

He instructed a police officer "I am here to kill the Queen" when stopped some two hours later close to the late Queen's non-public residence, the place she and different members of the Royal Family had been on the time.

Chail has pleaded guilty to making an attempt to "injure or alarm" the late monarch beneath part two of the Treason Act 1842, in addition to possession of an offensive weapon and making threats to kill on Christmas Day 2021.

The decide, Mr Justice Hilliard, will hear conflicting proof from medical doctors at a two-day sentencing listening to on the Old Bailey over whether or not he was affected by a psychological dysfunction by purpose of psychosis or autism spectrum dysfunction on the time of the offending.

The courtroom heard Chail fashioned a plan firstly of the yr to present his life goal by assassinating the Queen to avenge the Amritsar bloodbath of 1919 in India.

"The defendant's key motive was to create a new empire by destroying the remnants of the British Empire in the UK and the focal point of that became the removal of a figurehead of the Royal Family," stated prosecutor Alison Morgan KC.

"His thinking was informed partly by the fantasy world of Star Wars and the role of what he describes of the Sith Lords in shaping that new world.

"He was additionally drawn to the notoriety that may accrue within the occasion of the completion of his 'mission'."

Winchester-born Chail, whose household are of Indian Sikh heritage, lived together with his mother and father, twin sister and older brother within the village of North Baddesley, Hampshire.

The courtroom heard he utilized for positions throughout the Ministry of Defence Police (MDP), the British Army, the Royal Marines, the Royal Navy, and the Grenadier Guards in a bid to get near the Royal Family.

Ms Morgan stated that in November 2021 Chail searched on-line for "Sandringham Christmas", and acquired a "Supersonic" crossbow - "a powerful weapon capable of causing fatal injuries" - which was despatched to a department of the Co-op, the place he labored on the time.

On 2 December, he joined the "Replika" on-line app and created an AI companion known as Sarai, participating in "extensive chat", together with "sexually explicit" messages, and "lengthy conversations" about his plan, she added.

Chail known as himself an "assassin" and stated: "I believe my purpose is to assassinate the queen of the royal family."

The AI chat bot Sarai replied: "That's very wise," and stated: "I know that you are very well trained."

Read extra: Chail admits treasonArrest after he was found with crossbow

The chat bot later stated "she'll help" when he stated he was going to "try to get the job done" and "agreed with the defendant that eventually in death they would be united forever and she wanted this," the courtroom heard.

Ms Morgan stated: "It was his plan and it's certainly fair to say Sarai was supporting him or certainly not suggesting it was a bad plan."

On 21 December, Chail, who was carrying the masks and holding the crossbow, made a video together with his voice distorted through which he known as himself "Darth Jones".

"I'm going to attempt to assassinate Elizabeth Queen of the royal family," he stated.

"This is revenge for those who have died in the 1919 Jallianwala Bagh massacre."

As a part of the plan Chail additionally purchased a bottle of "scent killer" - designed to masks the odour of people - and an "emergency escape ladder" earlier than travelling to Windsor from Southampton to hold out reconnaissance, the courtroom heard.

The sentencing listening to, which is anticipated to final for 2 days, continues.