Article: Notable documentation of the war was provided by William Howard Russell (writing for The Times newspaper) and the photographs of Roger Fenton.:306–309 News from war correspondents reached all nations involved in the war and kept the public citizenry of those nations better informed of the day-to-day events of the war than had been the case in any other war to that date. The British public was very well informed regarding the day-to-day realities of the war in the Crimea. After the French extended the telegraph to the coast of the Black Sea during the winter of 1854, the news reached London in two days. When the British laid an underwater cable to the Crimean peninsula in April 1855, news reached London in a few hours. The daily news reports energised public opinion, which brought down the Aberdeen government and carried Lord Palmerston into office as prime minister.:304–11

Now answer this question: After the telegraph was extended to the coast of the Black Sea, how long did it take news of the war to reach London?
two days