It's been 10 years since London was rocked by a series of bombs that brought the capital's Tube network and roads to a standstill.
On that day confusion reigned: at first it was reported that there had been a power surge. At one point as many as six explosions were thought to have gone off.
In total 52 people died on that day, and hundreds more were left with injuries – some of which were life-changing.
Here we retrace the day that changed the capital – and the weeks that followed.
7:15amFour young British men carrying large rucksacks enter Luton train station.
7:25amThe men – later named as Mohammad Sidique Khan, 30, Shehzad Tanweer, 22, Hasib Hussain, 18 and 19-year-old Germaine Lindsa – join the commuter train to Kings Cross.
8:30amCCTV images show the men hugging before splitting off in different directions.
8:49amAn incident between Liverpool Street and Aldgate Tube stations - either an explosion or a collision between trains – is reported. Both stations report the matter, leading to confusion over the number of incidents.
8:50amSeconds later a bomb goes off on the Tube between King's Cross and Russell Square. Eyewitnesses report explosion appeared to come from outside the train.
8:50amAlmost instantaneously there is an explosion on a train at Edgware Road Tube station.
8:52amLondon Underground reports power surges on the network.
8:55amHussain is seen on Euston Road outside Kings Cross station, on his phone. He goes back to the station, where he buys a battery from WH Smiths and then goes into the McDonald's over the road.
9:15amEmergency services confirm they have been called to Liverpool Street after reports of an explosion, thought to be caused by the power failure.
London Underground begins shutting down the network and evacuating around 200,000 passengers from more than 500 trains after receiving reports of a train derailment at Edgware Road, a person under a train at Liverpool Street and walking wounded leaving stations.
9:19amHussain gets on the number 91 bus from King's Cross to Euston station, where he switches to the number 30 travelling east from Marble Arch.
9:29amMetropolitan Police confirm they are dealing with a major incident in London, but say it's too early to know what has happened.
9:30amA Cobra meeting is called
9:33amReports start to surface of an incident at Edgware Road Tube station
9:46amBritish Transport Police announces there have been explosions at King's Cross, Old Street, Moorgate, and Russell Square.
9:47amThe number 30 bus explodes at Upper Woburn Place/Tavistock Square.
09:49amThe entire London Underground system is shut down.
10:00amNational Grid announces there had been no problem with power surges.
10:40amReports of fatalities emerge. All hospitals are put on major-incident alert.
10:53amHome secretary Charles Clarke says “dreadful incidents” have caused “terrible injuries”.
11:08amBus services suspended across central London.
11:10amMetropolitan Police commissioner Sir Ian Blair says police believe there have been six explosions in what is believed to have been a coordinated terror attack. He appeals for calm, asks people not to travel to London or make unnecessary calls to emergency services.
11:25amPolice spokesman confirms there have been at least two fatalities.
12:05pmPrime Minister Tony Blair speaks from G8 summit in Gleneagles, calling the attacks a coordinated series of "barbaric" terrorist attacks. “There have been people who have died and people seriously injured,” he says.
12:10pmA website linked to al-Qaeda carries a statement saying it has carried out a "blessed raid" in London "in retaliation for the massacres Britain is committing in Iraq and Afghanistan".
12:55pmClarke tells MPs four explosions have been confirmed, although it is still not clear who carried out the attacks.
1:13pmMayor Ken Livingstone praises Londoners for responding “calmly and courageously” to the “cowardly terrorist attacks”.
3:25pmAt least 33 people are confirmed dead, while some of the injured have lost limbs.
4:35pmThe Union Jack flying over Buckingham Palace is lowered to half-mast at the Queen's request.
5:30pmBlair, who has flown back to London to attend an emergency meeting in Downing Street, urges the public not to "be terrorised".
6:13pmDeputy Assistant Police Commissioner Brian Paddick confirms 37 fatalities and seven hundred injuries, with roughly three hundred of those being transported by ambulance to London hospitals.
7:40pmForeign secretary Jack Straw says attack appears to have been carried out by Al Qaeda.
9:40pmThe Metropolitan Police announces that a person injured in one of the blasts has since died in hospital care.
10:19pmHussain's family reports him missing
11:00amMetropolitan Police holds a press conference, confirming four blast sites - three on the underground and one on the bus - not six as briefly thought. Death toll has risen overnight to 50.
3:00pmQueen Elizabeth visits victims of the attacks at the Royal London Hospital, and speaks out against terrorism.
3:30pmPolice commissioner Ian Blair and Ken Livingstone hold press conference, confirming 13 of those killed were caught in the Tavistock Square bomb.
12:30pmMetropolitan Police deputy assistant commissioner Brian Paddick, British Transport Police deputy chief constable Andy Trotter and London Underground managing director Tim O'Toole give a joint press conference, confirming that the three Tube explosions took place almost simultaneously.
7:30pmPolice evacuate Birmingham city centre after a security alert.
6:30amArmed 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. By this point three suspects have been identified from CCTV footage, a missing person's report and documents found in the debris at each bomb site.
11:30amUp 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.
1:20pmA 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.
13th JulyA raid by police and bomb disposal experts takes place at a house in Aylesbury in Buckinghamshire, after the identification of a fourth suspect.
12:26pmSmall explosions occur at Shepherd's Bush Tube station (Hammersmith and City line), Warren Street and Oval.
1:30pmA backpack is reported as exploding in east London on the Number 26 bus travelling from Waterloo to Hackney Wick.
2:30pmUniversity College Hospital is cordoned off by police, amid fears the bomber from the Warren Street Tube station ran into the building.
4:00pmSir Ian Blair says the situation is "firmly under control".
10:00amJean Charles de Menezes is shot dead by plain clothes police at Stockwell tube station.
4:30amYasin Hassan Omar, suspected of the failed attack at Warren Street on 21 July 2005, along with three 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 Taser stun gun. Later he is taken to London for questioning by the Police.
11:30amTwo more suspects are arrested in London. Later that same day, Hussain Osman, the fourth suspect, is arrested in Rome.
3 AugustPiccadilly Line returns to service.