The V-1 flying bomb (German: Vergeltungswaffe 1,[a])-also known to the Allies as the buzz bomb, or doodlebug,[3][b] and in Germany as Kirschkern (cherrystone) or Maikäfer (maybug)[5]-was an early pulsejet-powered predecessor of the cruise missile.
The V-1 was developed at Peenemünde Army Research Center by the Nazi German Luftwaffe during the Second World War. During initial development it was known by the codename "Cherry Stone". The first of the so-called Vergeltungswaffen series designed for terror bombing of London, the V-1 was fired from launch facilities along the French (Pas-de-Calais) and Dutch coasts. The first V-1 was launched at London on 13 June 1944[6]), one week after (and prompted by) the successful Allied landings in Europe. At its peak, more than one hundred V-1s a day were fired at south-east England, 9,521 in total, decreasing in number as sites were overrun until October 1944, when the last V-1 site in range of Britain was overrun by Allied forces. After this, the V-1s were directed at the port of Antwerp and other targets in Belgium, with 2,448 V-1s being launched. The attacks stopped when the last launch site was overrun on 29 March 1945.
The British operated an arrangement of air defences, including anti-aircraft guns and fighter aircraft, to intercept the bombs before they reached their targets as part of Operation Crossbow, while the launch sites and underground V-1 storage depots were targets of strategic bombing.[7]

The V2 flying bomb
They were the terrifying rockets that weren't unveiled until the final months of the Second World War, yet still killed thousands.
around 1,500 V2 rockets - the V stood for Vergeltungswaffe, or Vengeance Weapon -
were fired at London and the south east of England, in what was seen as Hitler's last throw of the dice.
V2      Death from above without warning: 70 years after the first one fell, Hitler's V2 rockets killed thousands of British civilians in final months of WW2
•First striking Britain in September 1944, V2 - V for 'vengeance weapon - was Hitler's last throw of the dice
•Around 1,500 'vengeance weapons'  were fired at London and the south east, ultimately leaving around 7,250dead
•The rockets used astonishingly advanced technology to shoot 50 miles into air, before arcing in a 120-mile trajectory
•Unlike the predecessor the V1, you could not see - or hear - a V2 coming as it travelled faster than the speed of sound
•The sophisticated technology from the V2s was later harnessed by the US and Soviet Union to pioneer space travel
When it landed, it left a crater 60ft wide and 16ft deep, and threw up around 3,000 tonnes of rubble into the air.
Such was its speed, the noise of the rocket rushing through the air came after it landed.
Notable V2 strikes on British soil included the first one, which hit Chiswick, west London, on 8 September 1944, killing three and injuring 17, and an attack on a Woolworths store in New Cross, south east London, in November that year which left 168 dead - England's worst death toll.
In total, the V2 attacks resulted in the deaths of around 7,250 British military personnel and civilians.
The V-1 and V2 flying bombs  from June 1944

German Jets And V1 And V2 Flying Bombs Of WW2
I was asked why I did not include the flying bombs in the Battle of Britain and the blitz , they did not enter the war until 3 years later in 1944 although they did tremendous damage and  casualties  in London and the south east