Not sure if it's the one you are thinking of, especially as it didn't involve a V1, but the Sandhurst Road School Disaster comes to mind - 20th January 1943. A 1000lb bomb fell on the school, killing 32 children and six staff.
10 posted on 09/14/2013 6:15:10 AM PDT by naturalman1975
("America was under attack. Australia was immediately there to help." - John Winston Howard)