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The GuardianAn unidentified person in Pakistan gave bomb-making advice and encouragement to the four suicide bombers on 7 July while they were plotting the attacks that would kill 52 people, an inquest into the victims' deaths has heard.
The leader of the bombers, Mohammed Sidique Khan, received a series of calls on a mobile phone used solely to plan the attacks from a number of public call boxes in Rawalpindi, it was revealed.
The bombers are believed to have been guided by an individual in Rawalpindi because they lacked expertise in making bombs, Detective Sergeant Mark Stuart of the Metropolitan police told the inquest.
Photographs of the bomb-making factory in Leeds where the group built explosive devices using concentrated hydrogen peroxide and pepper were shown at the inquest, at the Royal Courts of Justice yesterday.
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http://www.guardian.co.uk/uk/2011/feb/02/7-july-inquest-pakistan-terrorism