"The Arado Ar 234 was the world's first operational jet-powered bomber, built by the German Arado company in the closing stages of World War II. Produced in very limited numbers, it was used almost entirely in the reconnaissance role, but in its few uses as a bomber it proved to be nearly impossible to intercept. It was the last Luftwaffe aircraft to fly over England during the war, in April 1945."
With the high risk of being blown up some of the best pilots started tipping the V1's wing, because of damage to wing tips they later developed a tactic of disrupting the airflow by placing their wing very close to the V1's wing, causing it to topple. From Curmo's photostream on Flickr