A COMPUTER expert warned police about two of the July 7 bombers nearly two years before the attacks on London, it was reported today.
Martin Gilbertson, 45, claims he alerted officers in October 2003 of his fears about the activities of Mohammad Sidique Khan, who lived at Thornhill, and Shehzad Tanweer, from Leeds.
He worked on computers at an Islamic bookshop in Beeston, Leeds, which was attended by the suicide bombers.
Mr Gilbertson said: "They were really, very violently against the British society."
By October 2003 he was so alarmed by what was going on that he called the police leaving his number and address. Despite that the warning was left unheard until Khan, Tanweer and two others blew themselves up on July 7 last year, killing 52 people.
A West Yorkshire police spokesman said it was impossible to track the letter.
Mr Gilbertson, who is a former Hell's Angel, said he had gone to a police station to report his fears.
He then put his concerns down in writing on the advice of officers, he said.
"In 2003 I sent them some disks that had been produced by the bookshop in Beeston, which was very anti-Western, anti-Iraq, anti-everything and very anti-Semitic.
"Also included in it was a list of names, which included both Tanweer and Khan," he said.
Mr Gilbertson added he was not the only person in Beeston concerned about the pair.
"We actually thought they would be supporting attacks on British troops abroad.
"As I had nobody to turn to and the climate of fear within the area is unbelievable, I sent them to the West Yorkshire Police Force," he said.
Mr Gilbertson was asked by the pair to help them with the production of DVDs, which he described as extremely anti-Western, which included graphic images such as the bodies of children killed in Palestine or Afghanistan.
"I worked for them for nearly four years but they were really, very violently against the British society.
"They actually tried to convert me to Islam."
West Yorkshire police say there is now no trace of the letter or the list of names.
It says it will be impossible now to track what happened to his letter or to say whether Mr Gilbertson's information was acted upon.