The Baltic Exchange bombing was an attack by the Provisional IRA on the City of London, Britain's financial centre, on 10 April 1992, the day after the General Election which re-elected John Major from the Conservative Party as Prime Minister. The one-ton bomb – concealed in a van and consisting of a fertiliser device wrapped with a detonation cord made from 100 lb (45 kg) of semtex – was the biggest bomb detonated on mainland Britain since World War II. The bombing killed three people, injured 91 others, and severely damaged the Baltic Exchange and its surroundings.