A red-haired British man who plotted to kill Prince Charles so Prince Harry could become king has been detained indefinitely under British mental health laws.
Mark Colborne was convicted of planning terrorism in September.
He bought the ingredients for deadly poison cyanide over the internet and stockpiled dust masks, metal filter funnels, plastic syringes and latex gloves.
Prosecutors said the 37-year-old wrote about his hatred for "non-Aryans" and about how he was ``looking for major retribution, a mass terrorist attack."
They said he suffered from depression and felt marginalised as a white, red-haired man.
In his notebook, he wrote: "I don't want to be a serial killer. I'm more of an Anders Breivik. I have left potential targets open.
"I was waiting for an opportunity to kill one of them. Let it be Prince Charles, which would be good."
He went on to state that he wanted a "silent rifle", adding: "Take up a good position and put a bullet in Charles's head.
"He is protected but not too protected. I would sacrifice my life for that one shot. Kill Charles and William and Harry become king. Kill the tyrants."
Colborne was arrested in June 2014 after his family uncovered chemicals, items related to making lethal poison and notes detailing his racial hatred in his bedroom.
Judge John Bevan said Tuesday that Colborne was a ``warped individual" whose ``extraordinarily violent fantasies" were seriously concerning.
Colborne was ordered to be detained under section 37 of the Mental Health Act with a further restriction under section 41 "without limit of time" on the basis of two psychiatric reports.
The court heard that Colborne was "sane" but had a personality disorder with a degree of psychosis which warranted continued treatment at Ravenswood secure unit in Hampshire.