On this day 41 years ago, on October 12, 1984 (September 18, 1984 lunar calendar), there was a big explosion at the headquarters of the British Conservative Party's annual meeting. Margaret Thatcher was unharmed. A big explosion occurred at the headquarters of the British Conservative Party's annual meeting. At around 3 am on October 12, 1984, a large hotel used for the headquarters of the 101st annual meeting of the British Conservative Party was detonated by a 20-pound time bomb hidden in a room on the sixth floor of the Grand Hotel, which collapsed several floors, causing casualties among many people who were attending the Conservative Party's annual meeting. The four dead included one MP. Thirty-two people were injured, including John Wakeham, the Secretary of State for Trade and Industry and the Chief Inspector of the Conservative Party, who was seriously injured and hospitalized. Mrs. Thatcher was lucky enough to leave her apartment, which was later blown up, safe and sound a minute ago. Foreign Secretary Howe, Home Secretary Britton, and Conservative Party Chairperson Germer, who lived near her room, were also unharmed. "Life will go on as usual, and meetings will go on as usual," Mrs. Thatcher told a BBC reporter after the incident. According to the Irish Republican Army, it was responsible for the bombing. British political parties and national public opinion condemned the terror and blamed the poor security measures that killed and wounded almost the entire cabinet. Leaders of many countries called in condolences. Although the bombings reduced some attendees to the final day of the Conservative Party's annual conference, Mrs. Thatcher's calm and resolute final speech at the conference was rewarded with an eight-minute standing ovation.