A Gospel Oak man who sent “vile, racist emails” threatening to torture and rape a former boss and colleagues and hoarded a host of weapons including a samurai sword, air rifle and crossbow arrows at his home has been jailed.

Ham & High: Knives were found at Vongyer's Gospel Oak flatKnives were found at Vongyer's Gospel Oak flat (Image: Archant)

Lukas Vongyer, 40, of Wellesley Road, compiled a “target list” of former employers and other people he felt had wronged him, Wood Green Crown court heard.

He then inundated them with emails containing ‘extreme’ racist abuse and threats of torture and rape. He also carried out cyber attacks on their business websites - causing the sites to crash repeatedly.

Members of the Met’s Falcon cyber crime and fraud team searched Vongyer’s flat on May 13 to discover a haul of weapons and racist material. This included:

- Detailed plans for racial cleansing written and sketched by Vongyer

Ham & High: A lemon shaped bottle of ammonia was found in Vongyer's kitchenA lemon shaped bottle of ammonia was found in Vongyer's kitchen (Image: Archant)

- A handwritten “target list” featuring the names of his victims

- A high-powered air rifle

- A hunting knife, a second knife and a samurai sword

- Arrows for crossbows

Ham & High: The living room at his Gospel Oak flatThe living room at his Gospel Oak flat (Image: Archant)

- Camouflage clothing and boots

- Books detailing how to make bombs

- A squeezy lemon bottle containing ammonia - believed to be intended for squirting the acid at victims.

Officers seized Vongyer’s computer and found it to contain videos depicting extreme acts of violence as well as internet searches on his victims, cyber attacks and how to make bombs.

They also discovered chat room entries in which he admitted carrying out cyber attacks.

The businesses he targeted included Hampstead’s Tavistock and Portman NHS Trust, Nw2 fine arts and clocks dealer Brookpace and Lascelles, bridal firm Ronald Joyce and Arlidge security.

Investigating officer Det Sgt Ben Hobbs, of Falcon team, said: “Vongyer felt he had been wronged by his victims but his actions were not those of a disgruntled employee.

“He sent vile, racist emails threatening extreme violence against his victims and sometimes typed their home addresses in the emails to make the threats even more real. These emails left his victims feeling sick and terrified for their lives.

“It seems, from what we found in his flat, that he had put considerable time and effort into imagining what he saw as revenge against people who had employed him as many as 10 years ago. Thankfully, Vongyer never followed through with his threats.”

Vongyer was jailed for four years and ten months at Wood Green Crown Court on Monday after pleading guilty to a charge of racially aggravated harassment, four counts of unauthorised acts to impair a computer, one charge of blackmail and another of forgery.