By the end of the war, the RAF had aircraft that could escort bombers to target deep inside Germany and back. The Hawker Hunter and F-86 Sabre took the RAF supersonic.
By the end of the First World War, the RAF had bombers that could fly to Berlin and back. British civilians found themselves under direct attack - by Zeppelin airships.
Between the wars the RAF operated elegant flying boats to patrol the far flung corners of the Empire. The boats flew long missions over the oceans, looking for enemy submarines.
After the war, RAF transports helped keep Berliners alive during the Soviet blockade of the city in 1948/49. As well as flying round-the-clock operations into the airport.