Aldgate station plan, London undergroundA month into the official inquest into the ‘7/7’ London bombings of July 2005, it is clear that the governmental imperative to arrive at a clear, authoritative and final account of what happened on the day might prove impossible because of the unreliability of human memory. This was an event in which cameraphone footage from the scene was reaching the BBC within 20 minutes of the first of four explosions, and iconic images and memorial rituals were in place within days and weeks. Yet it took police four months to take witness statements and now five...