In Britain a law limiting what could be reported was brought in on 8th August 1914. What was this law called?

World War 1 saw the first mass use of propaganda by both sides.  Governments on both sides made sure that the people only heard what the government wanted them to.  The goal was to make people think that they were on the side of justice, to encourage people to volunteer for military service and, most of all, to portray the enemy as being evil.  Defeats went unreported, half-truths were exaggerated and lies were spread as news.  The facts differed greatly from what people actually got to hear.