"I am not familiar with how the claims in that list were verified" Your words - and again, the folks who did this research bounced the claims against British records. I can direct you to the individuals who did this research
Christopher Shores in Mediterranean Air War arrives at '100 or more shot down, crashlanded, or at least seriously damaged' DAF aircraft by Marseille, in itself pretty good accuracy . MAW is a day-by-day account of air combat and claims are also compared to the respective sides known losses. So if the 135 in that list is correct, then Shores must be missing some Britsih losses.