Pasir post 6
Just to add that German bombs were up to 80% more destructive than British bombs due to the Germans use of powdered aluminium.
The aluminium shortages at the beginning of WW2 meant that the Royal Navy had priority in alumised explosive for its torpedoes and depth charges and due to a monumental oversight by the Ministry of Supply the RAF were denied the more effective bomb until 1944.
How many RAF Aircrew lives could have been saved if they had been provided with the right type of bomb when aluminium was available a lot earlier in WW2.