Hello Wesley

welcome. to the forum.

Pretty much everything that can be gleaned for free from the internet is presented above. if you view his entry on the CWGC website, and view the Grave Registration Scan near the page bottom, https://www.cwgc.org/find-war-dead/c...rawford-allen/

You will see that he was posted to 21 OTU at that time. That's an Operational Training Unit, and was training crews for Bomber Command: http://www.rafweb.org/Organsation/OTU_1.htm

To learn anything more, you will need to obtain his RAF service record, which as he died during the war, you will be entitled to received a truncated copy of for if I recall, UKú30. See
https://www.gov.uk/get-copy-military...-elses-records

The OTU's were second line units, and larger than a bomber squadron and their day to day diary records do not record individuals or individual crew flights, so there may be a mention of him due to the accident, but beyond that, I wouldn't expect to find him mentioned therein.
http://discovery.nationalarchives.go...ils/r/C4100374

best bet is his service record and death certificate, sadly!

From the above, you know how he died, where he died, what he was doing in the RAF at the time (roughly).

I hope this helps