Hi James!
There are a lot of people interested on PR flights down here. I never heard about this incident, but some friends do possess the 540 Squadron's ORB and can help you.
Please could you put the name of your father down here? How many missions he flew? I do have a huge interest on PR Squadrons and would like to talk with you further. Was your father a member of the Mosquito Aircrew Association? I was a member and contacted a lot of former PR veterans. Can help you with some names if you do wish so...
my e-mail:
baumgartner_asv@yahoo.com.br
Yours,
Adriano Baumgartner