Strange, my deepest gratitude for this precious bit of information.
Just sharing with others:
https://www.pegasusarchive.org/pow/frames.htm
1. I regret to report the death of SGT. H.D. MALLORY, R.C.A.F., R.113624, PoW No.222739, and injuries inflicted to SGT. W.W. MASSIE, R.C.A.F., R.150556, PoW No.222744, caused by a low flying Ju 88 aircraft on April 30th, 1944. The aircraft was flying lower than the height of a tree, rose, hopped over it and then descended down over the football ground, killing Sgt H.D. Mallory and injuring Sgt. W.W. Massie. The Court Martial prosecution against the pilot is apparently still pending, Swiss Legation Berlin to enquire.
And more about the shot down of the Canadian who was killed here:
https://www.rafcommands.com/database...php?qnum=28341
So the date was 30th April 1944, and not the 25th as informed by Geoff Taylor on his book.