A judge at Leeds Crown Court told Martyn Gilleard, of Pool Court, he believed the 31-year-old intended to cause 'havoc'.

Gilleard was found guilty of charges of engaging in conduct in preparation of terrorist acts and collecting information for terrorist purposes.

He had already admitted possessing child pornography, and having ammunition without a firearms certificate.

Sentencing Gilleard for 11 years for the terror offences Judge Millford said: "You did not use the bombs but they were ready to be used for terrorist purposes, we don't know where but it would likely be mosques or other places with people of black, Asian or Jewish origin or those of the left who are against your white supremacist views.

"You have a deep seated hatred of people both black, Asian and Jewish.

"You believe, from reading your writings, that the time has come to stop the talking and engage in direct action against them.

"I am satisfied that you are a political fanatic with a constant interest in weapons.

"You are, without doubt, unrepentant of your extremist views and I am satisfied that you are dangerous and could cause risk to the general public.

"You were attracted by the prospect of being a 'lone wolf', a terrorist working alone."

Gilleard was also sentenced to five years for child pornography among other charges, with the judge adding he was 'a significant risk of specific offences of a sexual or violent nature'.

Police had uncovered his deadly cache of nail bombs, bladed weapons and bullets, as well as documents about terrorism and extreme right-wing literature last October while searching his home for child pornography.

Officers discovered about 39,000 indecent images of children, which included films and photographs and ranged from category one to five - where one is the least serious and five the most.

A further search by detectives and forensic teams from the Counter Terrorism Unit in Leeds uncovered more explosive material, camouflage clothing, balaclavas, a bomb-making manual and outdoor survival guides.

They also found gunpowder, ready-made fuses and a notebook containing hand-written expressions of extreme anti-Semitic views.

A search of his workplace found a high-visibility jacket which had been modified with a hand-drawn swastika and Combat 18 lettering, and colleagues told police that Gilleard had expressed racist views.

In police interviews, he admitted sympathising with white supremacists and accepted he was racist, but said he had become less racist in recent times.

During his trial he claimed he had only made the nail bombs because he was bored after drinking.

But the prosecution said Gilleard intended to use the weapons and documents found in his flat in terrorist acts to further his political cause.