23 April 1955. Workers of the Hock Lee Amalgated Bus Co, who were members of the pro-communist Singapore Bus Workers Union (SBWU) went on strike. They protested against the new work rosters and the formation of rival unions. The rival union, with 200 spare workers, was formed by the bus company to avert any possibility of strikes by the SBWU. The strikers attempted to stop the buses from leaving ...