08:50: Initial reports of an incident between Liverpool Street and Aldgatetube stations, either an explosion or a collision between trains. The reports from the two stations were initially thought to relate to two separate incidents
08:50: Explosion on train between King's Cross and Russell Square tube stations. Eyewitnesses report explosion appeared to come from outside the train (this explosion was initially reported to have happened at 08:56).
08:50: Explosion on train at Edgware Road tube station (this explosion was initially reported to have happened at 09:17).
09:28: Metronet Tube operator says the incident was caused by some sort of power surge.
09:33: Reports of an incident at Edgware Road tube station. Reports that passengers on a train hit by an explosion attempted to break windows with umbrellas in order to escape.
17:30: Having flown back from Scotland, from the G8 Summit, Prime Minister Tony Blair emerges from a meeting in Downing Street and urges the public not to 'be terrorised'.
18:13: Deputy Assistant Police Commissioner Brian Paddick confirms 37 fatalities: two in the bus explosion at Upper Woburn Place/Tavistock Square, seven at Liverpool Street/Aldgate, seven at Edgware Road, and twenty-one in the King's Cross/Russell Square blast, as well as around seven hundred injuries, with roughly three hundred of those being transported by ambulance to London hospitals.
21:40: The Metropolitan Police announce that a person injured in one of the blasts has since died in hospital care.
11:00: Metropolitan Police press conference. Confirmed that there are four blast sites - three on the underground and one on the bus - not six as briefly thought. Gives update on casualties: "The number of deaths stands at more than 50. There were 700 casualties, 350 of whom were treated at the scene, 350 of whom have been treated at hospital. 22 people are in a serious condition in hospital and one person has since died."1
06:30: Having identified three suspects from CCTV footage, a missing person's report and documents found in the debris at each bomb site, armed police and army bomb disposal experts conduct three raids in the Beeston and Holbeck areas of Leeds and two in nearby Dewsbury, in West Yorkshire. The Metropolitan Police lead this operation, working in conjunction with West Yorkshire Police.
11:30: Up to 600 residents are evacuated from the area of a sixth raid, in the Burley area of Leeds. Residents are unable to return to their homes for two days following the confirmation that explosives have been found at the site.
13:20: A controlled explosion is carried out at the site of the raid in Burley.
Luton Railway Station is closed as police investigate a car parked there and believed to be associated with the suspects caught on CCTV cameras. After a series of controlled explosions the car is taken away for further examination.
04:30: Yasin Hassan Omar, suspected of the failed attack at Warren Street on 21 July 2005, along with 3 other men, is arrested in Heybarnes Road, Birmingham. He was carrying a rucksack when he was arrested and, after resisting arrest, was hit with a Taserstun gun. Later he is taken to London for questioning by the Police.
11:30: Of the other three suspected attempted suicide bombers allegedly linked to the 21 July explosions, two are arrested in London. On that same day, Hussain Osman, the fourth suspect, is arrested in Rome.