The SiegeBritain's best selling historian writes the first definitive account of the famous televised SAS storming of the Iranian embassy in London in 1980 On April 30, 1980, six heavily armed gunmen burst into the Iranian embassy on Princes Gate, overlooking Hyde Park in London. There they took 26 hostages, including embassy staff, visitors, and three British citizens. A tense six day siege ensued as millions gathered around screens across the country to