In the very last scene Artie is saluted by the Regiment O.C. Artie returns his salute. In the British Army, you do not salute without a head cover. He should have "braced up". i.e. stood to attention.
Artie's medals appear to be the 1939-45 Star, France and Germany Star, Defence Medal, War Medal 1939-45, all of which would appear to be correct, but they are then followed by what seems to be a Military Medal. This should be first in order of precedence, not last.