A far-right extremist who pleaded guilty to terror offences and possessing explosives has been jailed for four years.
Filip Bednarczyk, 26, of Park Street, Luton, was sentenced at The Old Bailey.
He had previously admitted one count of possessing explosives and seven counts of possessing terrorist documents.
Bednarczyk was also given a one-year extended licence period and made subject to a 15-year notification order.
He had been arrested by counter-terrorism detectives on 11 December.
'A little excitement'
A search of his bedsit led to the discovery of handwritten notes, electrical component parts and a 2kg (4lb) bag of sulphur powder in the back of a wardrobe.
There was a tub of electronic components which could have been used to make a detonator.
Bednarczyk said he did not open the sulphur and told the court: "Out of boredom I was thinking about experimenting with the chemicals for a little excitement in the garden."
A folder was also found containing hundreds of pages including US patents, Polish text, scientific papers and other information about explosives.
The court also heard the father-of-one, who admitted having right-wing sympathies but denied being a neo-Nazi, had downloaded a large number documents and images about explosives.
They came with names such as Middle Eastern Terrorist Bomb Designs, Incendiaries - Advanced Improvised Explosives, Anarchy Cookbook Version 2000, CIA Explosives for Sabotage manual, Complete instructions on how to build undetectable hand grenades, and The Mujahideen Explosives handbook, the prosecution noted.
He also had the "manifesto" belonging to the man responsible for the 2019 attack in Christchurch, New Zealand, on his computer.
Judge Anthony Leonard told Bednarczyk he was "sure that you had an interest of making a bomb and not a firework".
The judge said he found some of Bednarczyk's evidence was contradictory, but he was convinced that his right-wing sympathies were the motivation behind his actions.