Kyt, Keith Thiele, still alive apparently and living in Australia, is the cousin of Max Lambert. I've just seen reference to him having the DFC and
two Bars.
Had a look for a Kiwi ace by the name of Harvey but it occurred to me it was a personal letter so it was more likely his first name. This chap fits but I'll have to check when I get home (not that I'll be able to confirm for a while!).
SLdr Harvey Nelson SWEETMAN 15 [12+3] 2 Shores & Will. (11,5 V-1s) RNZAF 485Sq, 486Sq, 3Sq 7+10,5V1s (Hess)
Fighter aces of New Zealand in WW2