Thank you Finn,

The Lincoln Archives has a lot of information about F/O Hamilton ( https://ibccdigitalarchive.lincoln.a..._search=Search ), including an account of the flight of NT494 from Kiel to the moment F/L Thomas left the aircraft (https://ibccdigitalarchive.lincoln.a...homasBHamilton[Mo]450829.pdf). There are some differences with the account given when he returned to 85 Squadron on 15 May (https://discovery.nationalarchives.g...ils/r/D8454904)

James was kind enough to point me to this source.

Brian