Petworth Boys School Bombing September 1942

Hi, My first post on this forum, so a big hello to all the regulars.

My relative George Charles Hunt was killed when Petworth Boys school was bombed on the 29th September 1942. I have recently completed a dedicated display in the museum on the subject. I am trying to find out what Luftwaffe unit may (accidently) have bombed the school on that terrible day. After 70 years it would be great to find out the unit and probably a dream but to find out the names of the crew. After 70 years nothing will change what happened and let's face it, this kind of tradgedy is a part of war that happened on both sides. Any info gratefully appreciated, I have a photo of George if anyone is interested.