A businessman who used the July 7 bombings as a "marketing opportunity" to promote a "terrorists' handbook" which he sold on the internet has been jailed for three years.
Terence Brown, 47, was found guilty following a trial at Winchester Crown Court of collecting and distributing material that could have led to attacks.
The court heard that he made 100,000 US dollars (£62,000) by selling CDs containing tens of thousands of pages of information at his home in Portsmouth, Hampshire.
Topics included "how to make a letter bomb" and "how to enter countries illegally".
The prosecution said the information, called the Anarchist Cookbook, could have been used by terrorists to plan and commit atrocities.
Brown was convicted of seven counts of collecting information which could have been used to prepare or commit acts of terrorism under the Terrorism Act 2000, two counts of selling and distributing the information under the Terrorism Act 2006 and a further count under the Proceeds of Crime Act.
Sentencing Brown, the judge, Mr Justice Blair, said he accepted that he was not a terrorist and acted solely out of financial motivations.
He said Brown initially offered the Anarchist Cookbook as a free gift to promote adult websites before starting to sell it when he realised he could make money from it.
Mr Justice Blair said that, within days of the London bombings, Brown downloaded further information and released a "limited edition" of the publication. He advertised the product by saying people should order before the CDs were banned, the court was told.
Mr Justice Blair said: "Your use of the 7/7 bombings as a marketing tool and the downloading of numerous material and selling of a limited edition was not just irresponsible but incredibly cynical. It must have crossed your mind that the information you were selling could have been used in further incidents in this country or abroad."