LONDON , England ( CNN ) -- A chronology of bombings and attempted bomb attacks in the mainland UK since the 1970s : . Police close off streets around Haymarket , in London 's busy theater district . June 29 , 2007 : Police defuse a bomb consisting of 200 liters of fuel , gas cylinders and nails found in an abandoned car in Haymarket , central London . A second car packed with gas and nails was later found to have been parked just a few hundred yards from the first , before it was towed away by traffic wardens in the early hours of Friday for violating parking restrictions . Police say two vehicles clearly linked . July 21 , 2005 : Two weeks after the deadly 7/7 bombings , four men are alleged to have attempted to carry out a second wave of attacks against London 's transport network at three London underground stations and aboard a bus . But their alleged rucksack bombs fail to explode . July 7 , 2005 : Four suicide bombers detonate themselves aboard three underground trains and a bus in a morning rush hour attack against London 's transport network , killing 52 people and injuring around 700 more . Al Qaeda claims responsibility in a video statement . August 2004 : Anti-terrorist police disrupt a plot by Islamic militants to blow up targets including the Ministry of Sound nightclub and the Bluewater shopping center in southeast England using explosives packed into limousines and large vehicles . Seven men are convicted in May 2007 and sentenced to up to 26 years in prison . March 2001 : A car bomb explodes outside the BBC 's London headquarters , wounding one man . Police blame the Real IRA , a republican splinter group opposed to the IRA 's cease fire . April 1999 : Three people die when a nail bomb explodes in the Admiral Duncan pub in London 's gay district -- the third in a spate of series of nail bomb attacks also targeting immigrant areas of the city that left dozens injured . A 23-year-old self-declared `` Nazi '' , David Copeland , is sentenced to six life terms . June 1996 : A massive IRA bomb explodes in a shopping center in central Manchester , injuring more than 200 people . February 1996 : Two people die as IRA terrorists detonate a bomb in London 's Docklands area , causing damage estimated at around $ 170m and ending the group 's 17-month cease fire . April 1993 : An IRA truck bomb devastates part of London 's financial district , killing one and wounding 44 . March 1993 : Two boys aged three and 12 are killed and dozens are injured by two bombs left in litter bins in Warrington , northern England . The IRA admits planting the bombs . April 1992 : A huge IRA car bomb in London 's financial district kills three people and wounds 91 . February 1991 : IRA terrorists launch a mortar attack at Prime Minister John Major 's Downing Street offices . No-one is injured . September 1989 : Eleven people die and 22 are wounded when an IRA bomb explodes at a Royal Marine music school in Deal , southern England . December 1988 : A Pan Am airliner explodes over the Scottish town of Lockerbie , killing 259 aboard and 11 people on the ground . Libyan agent Abdel Basset al-Megrahi , convicted of the attack in 2001 , was this week granted the right to mount a fresh appeal . ( Read about Lockerbie bomber ) October 1984 : Five people die in an IRA bomb attack on a hotel in Brighton , southern England , where Prime Minister Margaret Thatcher and her cabinet are staying for the Conservative Party 's annual conference . December 1983 : An IRA bomb at London 's Harrods department store kills six people . July 1982 : Two IRA bomb attacks on soldiers in London 's parks kill 11 people and wound 50 . October-November 1974 : A wave of IRA bombs in British pubs in Birmingham and Guildford kill 28 people and wound more than 200 . February 1974 : A coach carrying soldiers and families in northern England is bombed by the IRA , killing 12 and wounding 14 . E-mail to a friend .
Two cars loaded with gasoline and nails found abandoned in London Friday . The two men were arrested on suspicion of possession of a firearm without a license or ammunition for a dangerous weapon. British capital wracked by violence by the IRA for years .