As a starter at the PRO, AIR 27/1915 may have 462 Sqn's Operational Record books, although the file appears to have 461 Sqn in there as well - 'it says 'and 462 Sqn' in the catalogue.
AIR 27/1916 is listed as containing 462's ORB, while AIR 27/1917 would appear to cover the period from Jan 1944 (but, in my experience, it's always worth a look to see if earlier material has crept into a supposedly later file).
This may have the information you're looking for in it, but that depends upon the person who kept the records - some are more like diaries of what happened to the sqn in general, while others are literaly just a record of operations.
You might also be able to get hold of the individual's service record, but not at the PRO (sorry, National Archives - never get used to the rebranding...): To quote their site:
"The National Archives is not the place for service records, as these are still with the Ministry of Defence. Ex-servicemen and next-of-kin may obtain brief details by writing to: PMA (CS) 2a(2), RAF Innsworth, Gloucester GL3 1EZ."
Suggest that you have a look
here and you can navigate around the PRO site from that page too.
Hope this helps a little; also, the RAF Museum may well be able to assist, as might the Air Historical Branch (now at Bentley Priory) which will have squadron records as well. As 462 served in North Africa and then the UK, it is likely that all the surviving records (or copies of them) will be held in the UK, whatever might also exist in Australia.
You might also have a quick look
here ; the Australian War Memorial site (the page has a nav bar, so again you can get to other bits of the site which might help find record books, etc). You'll note from that webpage that the Sqn had a very high proportion of British personnel, much to the irritation of the Australian government!
Hope that this might help a little.