The poster "Leofwine" on this following forum may be able to assist you. It appears he has been researching attacks in Kent by Dornier 217's during 1943, particularly one where his father was machine-gunned in Bexleyheath.
It seems that there were numerous low-level attacks on civilians by the Dorniers around that time.
Air Raid - Bexleyheath 9th February 1943