This was mostly new to me. This site lists details about the V1 and V2 attacks on London from 1944-45. The V1s (above) were called Flying Bombs or Doodlebugs.

V-1s were flying missiles that had enough power to fly over the Channel and were capable of destroying 2 to 3 houses.They made a droning noise and as soon as the droning noise stopped people had 15 seconds to escape from the powerful blast that followed. The V-1s, which were more commonly known as "Doodle bugs or "Buzz bombs", were fired from France when it was taken over by Hitler. They were launched during 1944. About 8,000 were launched at Britain, and over 2,000 of them hit London. Over 6,000 Londoners were killed and about 500,000 homes were destroyed. 2,500 anti-aircraft guns were moved to the south coast to shoot down the deadly V-1s before they reached London. Many more evacuees were moved out of London due to these terrifying bombs.

More information at Wikipedia.