Mohammad Sidique Khan

On 1 September 2005, a videotape emerged featuring Khan. The videotape, shown by Al Jazeera Television, also shows Ayman al-Zawahiri, who is the highest leader of al-Qaeda. The two men do not appear together, and the British government says that al-Qaeda was not connected with the bombing. The Home Office believes the tape was edited after the suicide attacks and dismisses it as evidence of al-Qaeda's involvement. In the film, Khan declares, "I and thousands like me have forsaken everything for what we believe" and refers to his expectation that the media would already have painted a picture of him in accordance with government "spin". He goes on to say, "Your democratically elected governments continually perpetrate atrocities against my people all over the world. Your support makes you directly responsible. We are at war and I am a soldier. Now you too will taste the reality of this situation."

Born in St James's University Hospital, Leeds, Khan grew up in Beeston but moved to Lees Holm in Dewsbury, near Leeds in early 2005. His father, Tika Khan, a foundry worker, was born in Pakistan. His mother is Mamida Begum. He received his secondary education at South Leeds High School, formerly the Matthew Murray High School, which was also attended by Hasib Hussain, 7 July bus bomber. After completing his secondary education, he attended Leeds Metropolitan University to complete a degree in business. It was during this time that he met his wife Hasina Patel, and first became interested in extremist Islam.

Mohammad Sidique Khan reportedly postponed the event from 6 July 2005 because he had to take his pregnant wife to the hospital.

On the morning of 7 July 2005, Khan travelled by car with his three accomplices to Luton in Bedfordshire, where the four men caught a train to London King's Cross railway station.

On 18 July 2005, the Pakistani government released video footage of Khan arriving at Dubai airport on 19 November 2004 with Shehzad Tanweer, another of the London bombers. Khan and Tanweer stayed in Pakistan until 8 February 2005, then flew back to London together. A third member of the London group, 18-year-old Hasib Hussain, arrived in Karachi on 15 July 2004 from Riyadh, Saudi Arabia, on flight SV714.

According to David Leppard in The Sunday Times, Khan was assessed by MI5 in 2004, after his name appeared during an investigation into a plan to detonate a 600-lb truck bomb in London. MI5 concluded that Khan's link to the plotters was indirect, and he was not placed under surveillance. MI5 was later criticised for failing to follow up leads relating to Khan. The service responded to the criticisms. Channel 4 News published what it said were excerpts from the transcript of the tape.

According to the Israeli newspaper Maariv, Khan travelled to Israel on 19 February 2003, staying only one night and leaving the next day. Maariv reports that he was suspected of having helped to plan the 30 April 2003 suicide bombing of the Mike's Place bar in Tel Aviv which killed three Israelis, carried out by two British citizens of Pakistani descent. The Israeli government allegedly played down the report.

Khan is alleged to have travelled regularly to Dubai to attend military training camps, and is also believed to have spent time in Israel. In 2001 Khan was alleged to have learned bomb-making at the Malakand training camp. He is also alleged to have trained with Indonesian terror group Jemaah Islamiyah and to be directly involved with the 2002 Bali bombing.

In 1999 he came under the influence of radical cleric Abdullah el-Faisal.

His mother-in-law, Farida Patel, is also involved in education and works as a council liaison officer at a school in Dewsbury. In 1998 she was the first Asian woman to be invited to a Buckingham Palace garden party, meeting the Queen and other members of the royal family, in recognition for her work amongst the Muslim community in Dewsbury, and again in 2004. She was said to have been "devastated" by the actions of her son-in-law.

Mohammad Sidique Khan (20 October 1974 – 7 July 2005) was the oldest of the four homegrown suicide bombers and believed to be the leader responsible for the 7 July 2005 London bombings, in which bombs were detonated on three London Underground trains and one bus in central London suicide attacks, killing 56 people including the attackers and injured over 700. Khan bombed the Edgware Road train killing himself and six other people.