Probably the most devastating attack occurred on the evening of 29 December , when German aircraft attacked the City of London itself with incendiary and high explosive bombs , causing a firestorm that has been called the Second Great Fire of London . The first group to use these incendiaries was '' Kampfgruppe '' 100 which despatched 10 " pathfinder " He 111s . At 18:17 , it released the first of 10,000 fire bombs , eventually amounting to 300 dropped per minute . Altogether , 130 German bombers destroyed the historical centre of London . Civilian casualties on London throughout the Blitz amounted to 28,556 killed , and 25,578 wounded . The '' Luftwaffe '' had dropped of bombs
Second Great Fire of London
Second Great Fire of London
The Blitz