The opposition Labour Party won the February 1974 general election without a majority and then contested the subsequent October 1974 general election with a commitment to renegotiate Britain's terms of membership of the EC, believing them to be unfavorable, and then hold a referendum on whether to remain in the EC on the new terms.
Mercury also wrote six songs from Queen II which deal with multiple key changes and complex material. "Crazy Little Thing Called Love", on the other hand, contains only a few chords. Although Mercury often wrote very intricate harmonies, he claimed that he could barely read music.
On 17 June 1974, a 9-kilogram (20 lb) bomb planted by the Provisional IRA exploded in Westminster Hall. The explosion and the resulting fire, which was fed by a ruptured gas main, injured 11 people and caused extensive damage.