15th November 1918 Service Number Mystery "435304"

Flight Cadet William Tupper BECK "435304" ex 522122
He KIFA AW F.K.8 D5035, 18 TDS, Ismailia
Flt Cadet Oscar Edward Oberhuber (27) killed (pilot, New Zealander)
Flt Cadet William Tupper Beck (21) killed (passenger, Canadian) - formerly (522122) Canadian Army Medical Corps

I have seen 435304 quoted on CWGC as his service number but that does not match any record I know -
522122 is his ex Canadian Army Medical Corps

Flt Cadet Oberhuber is 11/353

16th November 1918 Cause Of Death

2) Member (Private) Rose Jane TURMAINE #7836 (also seen Rosa) Women's Royal Air Force died 16th November 1918 while serving 2 Salvage Section at Richborough Kent 0 Her AIR 80/243/72 file provides no clue - I suspect Influenza/pneumonia