Kill Charles and William and Harry become[s] king.

He also spoke in his diary of a desire to kill Britain’s Prince Charles and his son Prince William, to enable the red-haired Prince Harry to inherit the throne.

Colborne likened himself to Norwegian far-right terrorist Anders Breivik, who murdered 76 people in a bomb and shooting spree, and wanted to become a world-famous lone wolf terrorist.

A retrial found Mark Colborne, 37, guilty of preparing terrorist acts after over 14 hours of deliberations.

In writings uncovered by police, Colbourne compared himself to Anders Breivik, the extreme right-wing monster in Norway who slaughtered 77 people in a 2011 anti-Islam terror attack.

In the diary, Colborne had written about his plan to kill Prince Charles using a silent high-powered sniper rifle.

He bought the ingredients for deadly poison cyanide over the internet, and stockpiled dust masks, metal filter funnels, plastic syringes and latex gloves, jurors were told.

He wrote: “I don’t want to be a serial killer”.

Take down a silent rifle, take up a good stalker potion and put a bullet in Prince Charles’s head.

During the trial the court heard that Colborne had become so bitter for being “belittled’ for his hair”, he allegedly wanted to kill Prince Charles so flame-haired Prince Harry could be king.

The prosecution said Colborne’s notes expressed hatred for “non-Aryans” who he referred to as “blacks and Caucasian idiots”.

He was also found guilty of having books such as Assorted Nasties, Silent Death and The Poor Man’s James Bond, which contain recipes for making lethal poisons such as cyanide.

The 37-year-old fanatic was also accused of planning a “mass terrorist attack” using cyanide so that the world would know the “pain” of all his red-haired brothers.

On June 3 a year ago , Colborne’s half brother Kevin was preparing to do some decorating at the family home in Butts Road when he came across some receipts for chemicals.

Colborne made no reaction in the dock as the verdict was delivered.

Colborne was arrested in June 2014, but a trial jury failed to reach a verdict.

“This is a very unusual case involving, if I may say it, a very odd person”, said Judge John Bevan, who will decide whether to send Colborne to a secure mental hospital or to prison.

Colborne is due to be sentenced on 3 November.

He said: ‘Fantasies about killing people as a hitman – that was my number one fantasy.

Police praised the young man’s family in court today for coming forward with the information.