From the Intelligence and Security Committee's review of the Intelligence on the London Terrorist Attacks of 7 July 2005:
It was only several weeks after 7/7, when Mohammed Siddique KHAN was already known to have been one of the bombers, that a West Yorkshire Police Officer was looking through their files of old operations and recognised that this was Mohammed Siddique KHAN.
As Shiraz Maher, a senior research fellow at Policy Exchange, points out, the date here is hugely significant. Mohammed Siddique Khan was under surveillance in January 2001, nine months before 9/11 and several years before the Iraq war. So, the idea that he was radicalised by Afghanistan or Iraq just doesn't fit with the facts. We should face up to the reality that what motivated Mohammed Sidddique Khan to below himself up in an effort to kill as many civilians as possible was far more fundamental than the wars in Afghanistan or Iraq.