On July 7, 2005, a series of explosions hit the London underground system, shortly before 9am. Within the next hour the initial reports of power surges and a train derailment would prove to be far less than the actual horror, as a blast in Tavistock Square, on the number 30 bus, seemed to confirm the events as a coordinated attack.

In the aftermath a picture would begin to emerge of an attack conducted by four British men, started in Leeds at 4am and finishing with the deaths of 52 civilians and serious injury to hundreds more.

Timeline of how the morning of 7/7 unfolded

4 am Three of the attackers leave Leeds in a rented car.

Shehzad Tanweer, 22, Mohammad Sadique Khan, 30, and Hasib Hussain, 18, head south in the light blue Nissan Micra.

7am approx The trio meet the fourth bomber, Jermaine Lindsay, 19, in Luton station car park. The Micra parks next to Lindsay’s red Fiat Brava and the four men get out before appearing to transfer items between the two cars. The four put on rucksacks and enter Luton station where they board a train to London’s King Cross station.

CCTV still of the four attackers entering Luton station

7.40 The train leaves Luton, heading to London.

8.23 The four men arrive at King’s Cross station.

8.38 The bombers enter the Underground system. The group are seen hugging before they each go separate ways.

The coordinated attack begins

8.49 Three bombs explode on the London Underground within 50 seconds of each other.

The first bomb explodes on a train travelling between Liverpool Street and Aldgate. The bomb detonates when the train is roughly 100 yards from Liverpool street station. Eight people die, including the attacker, Tanweer. 171 are injured.

The second explosion strikes close to the Edgware Road station, by Mohammad Sidique Khan. Khan detonates his bomb in the second carriage from the front, killing seven including himself, and injuring another 163.

In the third explosion, Jermaine Lindsay kills 26 passengers on the packed train between King’s Cross and Russell Square. More than 340 are injured.

Picture by: ALEXANDER CHADWICK / AP/Press Association Images

Image: In this image provided by commuter Alexander Chadwick, taken on his mobile phone camera, passengers are evacuated from an underground train in a tunnel near Kings Cross station in London.

8.55 Hasib Hussain, the youngest of the bombers at 18-years-old, tries to call his accomplices on a mobile phone. He buys a 9-volt battery from WH Smith before going into a McDonald’s.

CCTV shows him moving around the King’s Cross station area after the three Underground explosions.

First reports of a major incident begin to emerge

9.12 Emergency services arrive on the scenes of the explosions. At this time there are reports of train derailment and a person under a train.

Picture by: John Stillwell / PA Archive/Press Association Images

Image: The scene as emergency services attend to the crash at Aldgate tube station in east London after the London Underground network was shut-down following explosions blamed on a power surge. Emergency services reported several injuries and Scotland Yard declared the emergency a "major incident".

9.19 London Underground issues an amber alert. The LU begins to shut down its network, ordering trains to stop at the next station. The process of evacuating 200,000 passengers begins.

9.29 The Met Police announce there has been a major incident in London. There is no reliable information about what has happened at this stage. Officials say there have been power surges on the Underground network.

Initial reports believed there were six incidents, as victims emerged from stations on both sides of the explosions.

Explosion on number 30 bus

9.47 Hussain has boarded a number 30 bus. He sits upstairs. The bus is packed due to the Underground service stoppage.
Hussain explodes his bomb in Tavistock Square. He kills 14, including himself, and injures 110. The explosion happens outside the headquarters of the British Medical Organisation, where a conference was taking place. Doctors in attendance were able to offer invaluable assistance to victims.

Investigations after the incident believed that Hussain’s original detonator may not have worked or he was unable to board the train at King’s Cross, as he had intended.

Picture by: Fiona Hanson / PA Archive/Press Association Images

Image: The scene in Tavistock Square, Central London, after a bomb ripped through a double decker bus.

WATCH: As live news coverage initially reported power surges, the sight of the destroyed number 30 bus began to bring the reality of a coordinated attacked into view.

This is how Sky News reported those moments.

10.21 Scotland Yard confirms “multiple explosions” in London.

11.25 First confirmation of deaths.

12pm Prime Minister Tony Blair, at G8 summit in Scotland, says: “It is reasonably clear there have been a series of terrorist attacks in London ... there are people that have died and people seriously injured.”

12.55 First claims of al Qaeda responsibility emerge online

15.25 Death toll put at 33 - it will eventually rise to 52 civilians.

22.19 Hasib Hussain’s family report him missing to the emergency casualty bureau.