Just found this in the Indie:
The mystery of the bus bomber's 'missing hour'
The suicide bus bomber went "missing" for an hour and 21 minutes before he detonated his explosive, killing a total of 13 people.
Anti-terrorist officers are appealing to the public for help in finding out where Hasib Hussain, 18, travelled and who he possibly met in the minutes leading up to his suicide attack.
Film from surveillance cameras have tracked the teenager leaving King's Cross station at 8.26am on Thursday, but there is no trace of him until he set off his bomb on the No 30 bus in Tavistock Square to the west at 9.47am.
Detectives are baffled as to why the young killer did not set off the bomb along with his fellow terrorists on Tube trains at 8.50am. Instead he waited nearly another hour.
It has been widely reported that the most likely reason was that Hussain was meant to travel north on the Northern line - with the other three heading south, east, and west - but was unable to complete this journey because the line was closed. However, Transport for London said yesterday that, although the Northern line had severe delays, it was working up to the time of the blasts. The bomber could also have travelled north on the Piccadilly line or the Victoria, but chose to go above ground. He probably walked around for several minutes before boarding the bus.
He may have lost his nerve, it could have been part of a plan, or he may have met up with a fellow terrorist or contact while in and around King's Cross.
Detectives have now appealed to the 80-odd people on the No 30 bus involved in the blast to contact them in case they remember seeing him getting on. Police released images from CCTV footage yesterday showing Hussain at Luton station at 7.20am after driving from Leeds.Deputy Assistant Commissioner Peter Clarke, head of the anti-terrorist branch, said: "We need to establish his movements up until 9.47am and up until the explosion occurred in Tavistock Square. Did you see this man at King's Cross? Was he alone or with others? Do you know the route he took from the station? Did you see him get on to a No 30 bus? And if you did, where and when was that?"
It is unclear where exactly Hussain boarded the bus, which started its journey at Marble Arch at 9am. By 9.30am it was in Euston Road near the junction with Gower Street, heading east. The closure of King's Cross station on the route ahead, because of the attacks on the Underground, meant that the bus had to be diverted from its normal route, to travel south into Woburn Place and Tavistock Square.