1992: Barot converts to Islam and listens to sermons by Abu Hamza al-Masri and Abdullah el-Faisal, London-based radical clerics later imprisoned in England on charges of inciting followers to kill Jews and other non-Muslims.
September 1995: Barot leaves his job as an airline ticket clerk in London to attend a terrorist training camp in Kashmir. He is taught to use weapons and explosives.
1999: Barot attends a training camp in the Philippines and publishes a book in Britain, under an alias, which discusses the actions of Muslim militants fighting Indian forces in Kashmir.
Barot marries in Thailand. Few details are known about his wife.
August 2000: Barot travels to the US to identify targets for al-Qaeda. He stays with an aunt in New Jersey.
March 2001: Barot travels to the US again. He films buildings in New York, including the World Trade Centre, the New York Stock Exchange and the Citigroup headquarters.
February 2002: Passport officials receive an application from Barot for a passport in the name of Pevin Preet Dhillon.
September 2002: Barot takes a short-term job as a night watchman at a block of luxury London apartments.
March 2003: Barot applies for a three month Pakistani visa under a false name - Haris Feroze.
January-February 2004: Using a false passport, Barot meets al-Qaeda financiers in Pakistan, and submits business plan-style proposals for his series of attacks.
June 2004: British intelligence agents put Barot under surveillance.
July 2004: Agents temporarily lose Barot and fear an attack could be imminent.
August 3, 2004: Barot is arrested in a London barber shop.
August 17, 2004: British police charge Barot and seven others with planning to commit murder and other counts, police allege they plan use radioactive materials, toxic gases, chemicals or explosives.
Investigators seize nearly 300 computers and around 1,800 discs, CDs and removable storage devices and open 4,000 garages and storage units.
Plans are uncovered for attacks in London and Washington, DC, Newark, New Jersey and New York City.
Barot refuses to answer questions during 19 interviews by police.
October 12, 2006: Barot pleads guilty to conspiring to commit murder. Prosecutors agree to drop 23 additional terrorism-related charges.
November 7, 2006: Barot is sentenced to life in prison, without a possibility of parole for 40 years.