On Thursday 7 July 2005, a series of four bomb explosions struck London's public transport system during the morning rush-hour.
All four incidents were suicide bombings.
Fifty-six people were killed and 700 people were injured.
The incident was the deadliest single act of terrorism in the United Kingdom since the 1988 bombing of Pan Am Flight 103 over Lockerbie, Scotland which killed 270 people and replaced the 1998 Omagh bombing (29 dead) as the second-most deadly terrorist attack on British soil.
It was also the deadliest bombing in London since World War II.

Blair made a statement about the day's bombings, saying that he believed it was "reasonably clear" that it was an act of terror, and that he hoped the people of Britain could demonstrate that their will to overcome the events is greater than the terrorists' wish to cause destruction.
He also said that his determination to "defend" the British way of life outweighed "extremist determination" to destroy it.
On 13 July 2005, he told that international co-operation would be needed to "pull up this evil ideology by its roots".

On 21 July 2005, a second series of explosions were reported in London, two weeks and some hours after the 7 July 2005 London bombings.
Four controlled explosions, of devices considerably less advanced than those of the previous attacks, were carried out at Shepherd's Bush, Warren Street and Oval underground stations, and on a bus in Shoreditch.
Even though the attacks on 21 July were less severe than those two weeks earlier, Blair was reported to have said that the bombings in London today were intended "to scare people and to frighten them, to make them anxious and worried".
He went on to say how the "police have done their very best, and the security services too, in the situation, and I think we have just got to react calmly and continue with our business as much as possible normal".

Concerns about terror attacks led to 10 Downing Street requesting media organisations not to identify the location of Blair's 2005 summer holiday.
After Blair attended a public function it was acknowledged that the holiday was in Barbados, as a guest of the singer Cliff Richard with whom Blair had stayed with before.
During a renewed stay there in August 2006, Blair refused to endorse calls for a ceasefire in Lebanon .

A Guardian/ICM poll conducted after the first wave of attacks found that 64% of the British population believed that Blair's decision to wage war in Iraq had led indirectly to the terrorist attacks on London.
The public did however indicate approval of Blair's handling of the attacks, with his approval rating moving into positive territory for the first time in five years.
In December 2005, Blair was presented with the "Statesman of the Decade" award by the EastWest Institute, a trans-Atlantic think tank that organises an annual Security Conference in Brussels.

Proposed laws to cope with the threat of terrorism proved extremely controversial; an amendment to require that glorifying terrorism be deliberate to be an offence was rejected in the House of Commons by just three votes (a result initially announced as a one-vote margin, due to a miscount).
The proposal to allow terrorist suspects to be held for questioning for up to 90 days was defeated on 9 November by a margin of 31 with 49 Labour MPs voting against the government.
Instead, MPs supported an amendment to allow questioning for 28 days proposed by veteran backbencher David Winnick.
This was Blair's first defeat on the floor of the House of Commons since he became Prime Minister in 1997, and most commentators saw this as seriously undermining his authority.
On Thursday 7 July 2005, a series of four bomb explosions struck London's public transport system during the morning rush-hour. All four incidents were suicide bombings. Fifty-six people were killed and 700 people were injured. The incident was the deadliest single act of terrorism in the United Kingdom since the 1988 bombing of Pan Am Flight 103 over Lockerbie, Scotland which killed 270 people and replaced the 1998 Omagh bombing (29 dead) as the second-most deadly terrorist attack on British soil. It was also the deadliest bombing in London since World War II.
Blair made a statement about the day's bombings, saying that he believed it was "reasonably clear" that it was an act of terror, and that he hoped the people of Britain could demonstrate that their will to overcome the events is greater than the terrorists' wish to cause destruction. He also said that his determination to "defend" the British way of life outweighed "extremist determination" to destroy it. On 13 July 2005, he told that international co-operation would be needed to "pull up this evil ideology by its roots".
On 21 July 2005, a second series of explosions were reported in London, two weeks and some hours after the 7 July 2005 London bombings. Four controlled explosions, of devices considerably less advanced than those of the previous attacks, were carried out at Shepherd's Bush, Warren Street and Oval underground stations, and on a bus in Shoreditch. Even though the attacks on 21 July were less severe than those two weeks earlier, Blair was reported to have said that the bombings in London today were intended "to scare people and to frighten them, to make them anxious and worried". He went on to say how the "police have done their very best, and the security services too, in the situation, and I think we have just got to react calmly and continue with our business as much as possible normal".
Concerns about terror attacks led to 10 Downing Street requesting media organisations not to identify the location of Blair's 2005 summer holiday. After Blair attended a public function it was acknowledged that the holiday was in Barbados, as a guest of the singer Cliff Richard with whom Blair had stayed with before. During a renewed stay there in August 2006, Blair refused to endorse calls for a ceasefire in Lebanon .
A Guardian/ICM poll conducted after the first wave of attacks found that 64% of the British population believed that Blair's decision to wage war in Iraq had led indirectly to the terrorist attacks on London. The public did however indicate approval of Blair's handling of the attacks, with his approval rating moving into positive territory for the first time in five years. In December 2005, Blair was presented with the "Statesman of the Decade" award by the EastWest Institute, a trans-Atlantic think tank that organises an annual Security Conference in Brussels.
Proposed laws to cope with the threat of terrorism proved extremely controversial; an amendment to require that glorifying terrorism be deliberate to be an offence was rejected in the House of Commons by just three votes (a result initially announced as a one-vote margin, due to a miscount). The proposal to allow terrorist suspects to be held for questioning for up to 90 days was defeated on 9 November by a margin of 31 with 49 Labour MPs voting against the government. Instead, MPs supported an amendment to allow questioning for 28 days proposed by veteran backbencher David Winnick. This was Blair's first defeat on the floor of the House of Commons since he became Prime Minister in 1997, and most commentators saw this as seriously undermining his authority.
Premiership of Tony Blair