Fascinating story! Thanks for posting.

According to The Blitz - Then and Now (p. 237 and 239) Keller was flying an FW-190 A-5 (2587). His aircraft (Black 7+) was downed at 1005 by AA fire, crashing in pieces on Godinton Rd. The only other aircraft listed as lost that day was a Ju-88.

Oberleutnant Paul Keller, born 23 January 1918, was staffelkapitan of 10/JG 54. He is buried in the German plot in Folkestone New Cemetery in Hawkinge.

Fifty people were killed in the raid and 77 seriously injured.