from what I understand from my father, who was also a member of the communist party, the official communist party line was that it was a capitalist war, and not one that communists had to bother themselves about, so many communist party members [other than Ewan], went absent, and didnt join up until the Soviet Union entered the war.
I suspect that Ewans memories of the war are not as interesting as other aspects of his life,such as his contribution to the Radio Ballads, which are described in the excellent book by Peter Cox.
Dick Miles.