Many thanks Laurent!
Fascinating - I'm wondering whether (given how bad Bunge's handwriting was) the "Badly shot up by Spitfire" should actually be "Shot up by a Spitfire"? Doesn't answer the question of who Rodney Scrase shotdown though and especially given the very clear depiction in his combat report of an FW190 crashing - furthermore his 'kill' was verified. Also there were 10 Spitfires that engaged, with lots of witnesses, so it is not like it was him on his own.
I still think the most likely person Scrase shot at was Bunge, like a lot of things I guess we'll never know for sure. Many thanks for the help
