Another error was the German failure to develop a long-range fighter. This meant that the Luftwaffe was unable to escort its bombers all the way to their targets, and many were shot down by RAF fighters.
Finally, the German intelligence service was unable to provide accurate information about the RAF's strength and capabilities. This led to the Luftwaffe making several costly mistakes, such as the bombing of Coventry in November 1940, which killed over 500 people and destroyed much of the city centre.
In conclusion, the Battle of Britain was a turning point in the Second World War, and the German defeat was due to a number of errors, including the focus on bombing cities, the lack of a long-range fighter, and the failure of intelligence.