Terror plotter Mark Colborne detained indefinitely Published duration 22 December 2015

image copyright Getty Images image caption Mark Colborne expressed a desire to shoot Prince Charles with a sniper rifle, the court heard

A man who fantasised about "putting a bullet in Prince Charles' head" has been detained indefinitely.

Mark Colborne, 37, of Southampton, was found guilty in September of preparing terrorist acts from his bedroom after a retrial.

Jurors heard he had felt "belittled" for being a white, ginger-haired male and had wanted to seek revenge.

He was found guilty of possessing handwritten notes and books related to making recipes for lethal poisons.

The Old Bailey heard how Colborne had written about assassinating Prince Charles in order for Prince Harry to become king.

When police officers searched his house they found ingredients for making cyanide.

'Warped individual'

Prosecutor Annabel Darlow said Colborne's notes also expressed admiration for right-wing extremists such as Anders Breivik and hatred for "non-Aryans" whom he referred to as "blacks and Caucasian idiots".

"I'm looking for major retribution, a mass terrorist attack which will bring to the attention our pain not just mine but my brothers around the world," he wrote.

Colborne bought ingredients over the internet, and stockpiled dust masks, metal filter funnels, plastic syringes and latex gloves at his home in Butts Road, jurors were told.

He was cleared of intending to use the chemicals and paraphernalia as part of the terror plot.

Colborne's half-brother and mother uncovered the chemicals and handwritten papers stashed in his bedroom, which led to his arrest on 3 June last year.

image copyright Google image caption Incriminating diaries were found in Mr Colborne's 'extremely cluttered' bedroom, the court heard

Sentencing Colborne under the Mental Health Act, Judge John Bevan QC said he was "clearly dangerous" and his "extraordinarily violent fantasies" were "seriously concerning".

"You have been consumed with rage at disparate individuals and groups and you write in graphic terms of bombing and butchery," he said.

"You are, I regret to say, a warped individual who in the past has held views of your fellow man which were repugnant to right-thinking people."

"Many people have unpleasant childhood memories, but they move on and grow up.

image copyright Hampshire Constabulary image caption Police released images of some of the substances found in Mark Colborne's home address

"Your extravagant self pity has made your life a misery and your family's life a misery too."

Under cross-examination, Colborne said the planned attacks were "angry rants" while he was off his medication for depression.

The court heard he was "sane" but had a personality disorder with a degree of psychosis which warranted continued treatment.

As a result of the case, Colborne's brother and mother were no longer speaking to one another, the judge said.