Following the 7/7 bombings, many of the victims’ families had called for a public inquiry into the bombings to establish whether the attacks could have been prevented by the police and MI5. Debate especially arose about the fact that the MI5 largely ignored the appearance of Mohammed Sidique Khan and Shehzad Tanweer on their terrorism radar a year earlier. Khan and Tanweer had been caught on surveillance cameras in 2004; however, to disguise the origin of the photograph before showing it to an Al Qaeda informant in the US, the image was cut in halves and cropped, making Tanweer unrecognizable. The picture of Khan was discarded entirely.
The coroner Lady Justice Hallett was critical of the Security Services’ procedures and the decision to crop the image. While she believed that MI5 had held important clues to identify the 7/7 bombers before the attacks, she ruled that Security Services could not have prevented the bombings. However, she pointed out flaws in MI5’s decision-making and recommended reviews of and improvements to their techniques as well as the recording and assessment of targets to prevent events like 7/7 from happening again.