Ian Davison was arrested on 2 June
A man has admitted producing the lethal poison ricin while preparing for acts of terrorism.
Ian Davison's home in Myrtle Grove, Burnopfield, County Durham, was raided last June by anti-terror officers who found the substance in a jam jar.
At Newcastle Crown Court he also admitted possessing documents which detailed how to make explosives and could be used in acts of terrorism.
The 41-year-old lorry driver is expected to be sentenced next month.
Some of the charges related to copies of three texts including The Anarchist's Handbook, which detailed instructions on making explosives.
Davison, who wore a pale blue, short-sleeved shirt and was flanked by four prison officers, also admitted possession of a prohibited weapon.
That charge related to a spray canister found during the raid on his home.
He was remanded in custody and Judge John Milford warned him: "Doubtless you have been told only custody can follow."
Davison will be sentenced after the trial of his son Nicky, 19, who denies two charges of possessing material containing information likely to be useful to a person committing or preparing acts of terrorism.
That case will be heard on 12 April.