The Brighton hotel bombing was a Provisional Irish Republican Army (IRA) assassination attempt against the top tier of the British government that occurred on 12 October 1984 at the Grand Brighton Hotel in Brighton, England, United Kingdom. A long-delay time bomb was planted in the hotel by IRA member Patrick Magee with the purpose of killing Prime Minister Margaret Thatcher and her cabinet, who were staying at the hotel for the Conservative Party conference. Although Thatcher narrowly escaped the blast, five people connected with the Conservative Party were killed, including a sitting Conservative Member of Parliament, and 31 were injured.