Sdr Ldr John Dawson Clements of 1435 Sqn Serial Number 60094 aged 34 died 8.3.1944 (not 7.3.1944) according to the CWGC
http://www.cwgc.org/search/casualty_...sualty=1081679
Also, I have seen the loss of LZ992 recorded for the 8.3.1944 and not 7.3.1944
If you say he was captured alive (and certainly the pilot of LZ992 was reported to have abandoned his aircraft), it implies he died in captivity at a later (unknown date), but the CWGC has recorded his death on the date of his last mission.
Paul