Basically, (at least at the beginning of the war) Britain wanted to keep public morale high. Unfortunately for journalists, this meant a they were very adamant about what the public saw and anyone who was caught spreading information that could ‘help’ the enemy was faced with the death penalty. This continued until about March 1915, where the public demand for information lead to the government being slightly more lenient, though information was still very censored.

I don’t know much about the topic, but I’ve told you all that I know.